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acute angle

right angle

obtuse angle

straight angle

an angle that measures less than 90 degrees

an angle that measures 90 degrees exactly

an angle that measures more than 90 degrees, but less than 18…

an angle that measures 180 degrees exactly

acute angle

an angle that measures less than 90 degrees

right angle

an angle that measures 90 degrees exactly

Point

Line

Collinear

Noncollinear

an exact location in space. It is represented by a dot and is…

a continuous set of points that follow a straight path. It ex…

points are collinear if a straight line can be drawn through…

points are noncollinear if no one line can be drawn through t…

Point

an exact location in space. It is represented by a dot and is…

Line

a continuous set of points that follow a straight path. It ex…

line

ray

segment

parallel lines

extends without end in two opposite directions

has one endpoint and extends without end in one direction

has two endpoints

lines that never meet lines that are the same distance apart

line

extends without end in two opposite directions

ray

has one endpoint and extends without end in one direction

ray

plane

line

line segment

a part of a line. It has one endpoint and extends without end…

a perfectly flat surface that extends infinitely in all direc…

a straight path that extends without end in opposite directio…

a part of a line or a ray from one endpoint to another

ray

a part of a line. It has one endpoint and extends without end…

plane

a perfectly flat surface that extends infinitely in all direc…

If a triangle is a right triangle (Pyt…

If the square of one side of a triangl…

If two angles are right angles (Theore…

If two angles are straight angles (The…

then a^2 +b^2= c^2

then the triangle is a right triangle.

then they are congruent

then they are congruent

If a triangle is a right triangle (Pyt…

then a^2 +b^2= c^2

If the square of one side of a triangl…

then the triangle is a right triangle.

What are the three undefined terms?

Collinear Points

Coplaner Points

Line Segment

Point, line, plane

Points through which one line can be drawn

Points that all lie on the same plane

Two points on a line and all the points on the line between t…

What are the three undefined terms?

Point, line, plane

Collinear Points

Points through which one line can be drawn

prism

polyhedron

plane

obtuse triangle

a polyhedron with two parallel congruent faces called bases

a 3D figure with faces that are polygons

a 2D flat surface that extends in all directions

a triangle having one obtuse angle

prism

a polyhedron with two parallel congruent faces called bases

polyhedron

a 3D figure with faces that are polygons

line

line segment

ray

parallel lines

A continuous extent of length, straight or curved, without an…

part of a line with two endpoints

A part of a line, with one endpoint, that continues without e…

lines in the same plane that never intersect

line

A continuous extent of length, straight or curved, without an…

line segment

part of a line with two endpoints

Midsegment of a Triangle

Midsegment Theorem

Perpendicular Bisector

Equidistant

a segment that connects the midpoints of 2 sides of the trian…

the segment connecting the midpoints of 2 sides of a triangle…

a segment, ray, line, or plane that is perpendicular to a seg…

when a point, between 2 figures, is the same distance to each…

Midsegment of a Triangle

a segment that connects the midpoints of 2 sides of the trian…

Midsegment Theorem

the segment connecting the midpoints of 2 sides of a triangle…

line segment

line

ray

surface of paper is ____ which gives i…

a straight line with a beginning and an end;... has definite len…

a line segment extending endlessly on both sides;... doesn't hav…

part of a line that extends endlessly in one direction only;…

flat

line segment

a straight line with a beginning and an end;... has definite len…

line

a line segment extending endlessly on both sides;... doesn't hav…

acute angle

angle

line

line segment

an angle measuring less then a right angle (90 degrees)

Two rays that meet at the same point

a straight segment that goes on forever in both directions

part of a line connecting two points

acute angle

an angle measuring less then a right angle (90 degrees)

angle

Two rays that meet at the same point

point

line

ray

line segment

a fixed location in space

a figure made up of points that extend forever in both direct…

a figure that has one endpoint and extends forever in the oth…

a piece of a line marked by two endpoints

point

a fixed location in space

line

a figure made up of points that extend forever in both direct…

Area

Compose

Cone

Cube

the area of a figure is the number square units it encloses

to compose two geometric figures, you join them together two…

a cone is a three-dimensional figure with one circular base a…

a cube is a rectangular prism whose faces are all square

Area

the area of a figure is the number square units it encloses

Compose

to compose two geometric figures, you join them together two…

Quadrilateral

Trapezoid

Parallelogram

Rectangle

You are a flat shape with four straight sides. I am the most…

you are a four sided figure with one pair of parallel sides.

You are a 4-sided flat shape with straight sides where opposi…

You are a 4-sided flat shape with straight sides where all in…

Quadrilateral

You are a flat shape with four straight sides. I am the most…

Trapezoid

you are a four sided figure with one pair of parallel sides.

height

length

width

area

(noun) the vertical distance from top to bottom.

(noun) the distance along a line or curve.

(noun) the distance from one side of an object to another.

(noun) the amount of surface inside a 2-dimensional shape. Th…

height

(noun) the vertical distance from top to bottom.

length

(noun) the distance along a line or curve.

Point

Line

Plane

Segment

Represents a position in space.

Continues without end in opposite directions.

A flat surface with no thickness that continues without end i…

Part of a line with two endpoints.

Point

Represents a position in space.

Line

Continues without end in opposite directions.

circumcenter

perpendicular bisector

bisect

centroid

where all the perpendicular bisectors of a triangle intersect

Bisects a segment and is perpendicular to it.

to cut exactly in half

The point of concurrency of the medians of a triangle

circumcenter

where all the perpendicular bisectors of a triangle intersect

perpendicular bisector

Bisects a segment and is perpendicular to it.

Tangent-Radius Property

Angle-Sum Property

Pythagorean Theorem

Centre Point

A tangent is perpendicular (forms right angle) to the radius…

The sum of the 3 angles in a triangle is always 180°

a² + b² = c²

The point at the perfect centre of the circle.

Tangent-Radius Property

A tangent is perpendicular (forms right angle) to the radius…

Angle-Sum Property

The sum of the 3 angles in a triangle is always 180°

Latitude

Longitude

Circumference

Ellipse

The measure of the degrees north and south of the equator. Di…

The measure of the degrees east and west of the prime meridia…

perimeter

Looks like an elongated circle. The path of a planet in the s…

Latitude

The measure of the degrees north and south of the equator. Di…

Longitude

The measure of the degrees east and west of the prime meridia…

A geometric figure that has length, wi…

pyramid

cylinder

cone

solid

a three dimensional shape with a polygon as its base, and tri…

a solid figure with two bases and one curved surface

a solid figure that has a circular base and comes to a point…

A geometric figure that has length, wi…

solid

pyramid

a three dimensional shape with a polygon as its base, and tri…

attribute

congruent angles

isosceles triangle

scalene triangle

A characteristic of a figure.

Angles of a figure that are equal in measure.

A triangle with 2 equal sides of the same length.

A triangle with no congruent sides.

attribute

A characteristic of a figure.

congruent angles

Angles of a figure that are equal in measure.

Capital B

Lower-case b

Volume of a rectangle or parallelogram

Area of a rectangle or parallelogram

signifies area of the Base when calculating the VOLUME of a r…

signifies area of the base when calculating the area of a rec…

(V=Bh)

(A=bh)

Capital B

signifies area of the Base when calculating the VOLUME of a r…

Lower-case b

signifies area of the base when calculating the area of a rec…

Midpoint

Segment Bisector

Angle Bisector

Adjacent Angles

A point that divides a segment into 2 equal... segments.

A segment/ray or line that intersects another segment at its…

A ray that divides an angle into 2 equal angles.

Two angles that share a common side.

Midpoint

A point that divides a segment into 2 equal... segments.

Segment Bisector

A segment/ray or line that intersects another segment at its…

acute

obtuse

congruent

relation / relative

An angle more than 0 degrees and less than 90 degrees

an angle more than 90 degrees and less than 180 degrees

Having the same size and shape

When comparing similar or congruent shapes, the sides or angl…

acute

An angle more than 0 degrees and less than 90 degrees

obtuse

an angle more than 90 degrees and less than 180 degrees

Angle

Circle

Perpendicular Lines

Parallel Lines

The amount of turn between two straight lines that have a com…

Two dimensional shape created by drawing a curve that is alwa…

Two lines that create a 90 degree angle when they intersect

Two lines on a plane that will never meet. They are always th…

Angle

The amount of turn between two straight lines that have a com…

Circle

Two dimensional shape created by drawing a curve that is alwa…

Vertical Angles

Supplementary Angles

Right Angle

Complimentary Angles

Formed by 2 intersecting lines or segments. Always congruent.

Two angles that form a line and add up to 180°.

An angle that measures 90°.

Two angles that add up to 90°.

Vertical Angles

Formed by 2 intersecting lines or segments. Always congruent.

Supplementary Angles

Two angles that form a line and add up to 180°.

Plane Shapes

Sort

Side

Rhombus

A closed, two-dimensional or flat figure

To arrange or group in a special way (such as by size, type o…

Any line segment used to form a polygon. (2-dimensional)

A 4-sided flat shape with straight sides where all sides have…

Plane Shapes

A closed, two-dimensional or flat figure

Sort

To arrange or group in a special way (such as by size, type o…

model

polygon

quadrilateral

triangle

a three-dimensional representation of a thing or concept.

2-D shape that has 3 or more straight sides

a 2D shape with four sides and four angles

a polygon with three sides and three angles

model

a three-dimensional representation of a thing or concept.

polygon

2-D shape that has 3 or more straight sides

Acute Angle

Obtuse Angle

Right Angle

Angle

an angle less than 90 degrees but more than 0 degrees

An angle that measures more than 90 degrees but less than 180…

an angle that measures 90 degrees

A figure formed by two rays with a common endpoint

Acute Angle

an angle less than 90 degrees but more than 0 degrees

Obtuse Angle

An angle that measures more than 90 degrees but less than 180…

Polygon

Regular Polygon

Triangle

Quadrilateral

2D shape... Closed... Three or more side

A polygon whose lines are all the same length

A three sided polygon

A four-sided polygon

Polygon

2D shape... Closed... Three or more side

Regular Polygon

A polygon whose lines are all the same length

acute triangle

attribute

congruent angles

congruent sides

Each angle measures less than 90*

A characteristic of a figure.

Angles of a figure that are equal in measure.

Sides of a figure that are equal in length.

acute triangle

Each angle measures less than 90*

attribute

A characteristic of a figure.