# Study sets matching "geometry flashcards"

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Equilateral Triangle

Isosceles Triangle

Angle Bisector

Altitude

Triangle in which all three sides are equal

2 sides of a triangle are equal

A line or ray that divides a angle into two congruent angles

Line segment through a vertex and perpendicular to a line cont…

Equilateral Triangle

Triangle in which all three sides are equal

Isosceles Triangle

2 sides of a triangle are equal

Vertical Angles

Parallel Lines

Pythagorean Theorem

Pythagorean Triples

each of the pairs of opposite angles made by two intersecting…

two lines that are always the same distance apart and NEVER to…

a²+b²=c²

3-4-5 (and its multiples)... 5-12-13 (and its multiples)... 7-24-25…

Vertical Angles

each of the pairs of opposite angles made by two intersecting…

Parallel Lines

two lines that are always the same distance apart and NEVER to…

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Equilateral Triangle

Isosceles Triangle

Angle Bisector

Altitude

Triangle in which all three sides are equal

2 sides of a triangle are equal

A line or ray that divides a angle into two congruent angles

Line segment through a vertex and perpendicular to a line cont…

Equilateral Triangle

Triangle in which all three sides are equal

Isosceles Triangle

2 sides of a triangle are equal

Equilateral Triangle

Isosceles Triangle

Angle Bisector

Altitude

Triangle in which all three sides are equal

Triangle in which two sides are equal

A line or ray that divides a angle into two congruent angles

Line segment through a vertex and perpendicular to a line cont…

Equilateral Triangle

Triangle in which all three sides are equal

Isosceles Triangle

Triangle in which two sides are equal

Third Angles Theorem

Side Angle Side Theorem

Base Angles Theorem

Converse of the Base Angles Theorem

If two angles of one triangle are congruent to two angles angl…

If two sides and the included angle of one triangle are congru…

If two sides of a triangle are congruent then the angles oppos…

If two angles of a triangle are congruent then the sides oppos…

Third Angles Theorem

If two angles of one triangle are congruent to two angles angl…

Side Angle Side Theorem

If two sides and the included angle of one triangle are congru…

Radius

Tangent Circles

Diameter

Secant

a straight form the center of circumference of a circle or sph…

In geometry, tangent circles (also known as kissing circles) a…

The diameter is also a chord. A chord is a line that joins any…

a straight line that cuts a curve in two or more parts.

Radius

a straight form the center of circumference of a circle or sph…

Tangent Circles

In geometry, tangent circles (also known as kissing circles) a…

Vertical Angles

Parallel Lines

Pythagorean Theorem

Pythagorean Triples

opposite angles made by two intersecting lines

plane which do not meet

geometry among the three sides of a right triangle

are integer solutions to the Pythagorean Theorem,

Vertical Angles

opposite angles made by two intersecting lines

Parallel Lines

plane which do not meet

Midsegment

Midpoint

Perpendicular Bisector

Equidistant

Connects the midpoints of two sides in a triangle. It is paral…

A point that divides a segment into two congruent pieces (in h…

A line that is perpendicular to a segment at its midpoint (cut…

The same distance

Midsegment

Connects the midpoints of two sides in a triangle. It is paral…

Midpoint

A point that divides a segment into two congruent pieces (in h…

Complementary Angles

Supplementary Angles

Vertical angles

Straight Angle Pair

Angles whose measurements add up to 90

Angles whose measurments add up to 180

Always Congruent

2 Angles that form a straight line (supplementary)

Complementary Angles

Angles whose measurements add up to 90

Supplementary Angles

Angles whose measurments add up to 180

Quadrilateral

Kite

Trapezoid

Parallelogram

sides can be any length angles can be any degree

has 2 pairs of adjacent sides, each pair sides are equal lengt…

sides can be any length, has only one pair of parallel sides,…

opposite sides are equal length, opposite sides are parallel,…

Quadrilateral

sides can be any length angles can be any degree

Kite

has 2 pairs of adjacent sides, each pair sides are equal lengt…

Point

Line

Line segment

Ray

A point is represented by a dot

A line extends forever in both directions

A line segment has a beginning and end point

A ray is a part of a line that has an endpoint and an end that…

Point

A point is represented by a dot

Line

A line extends forever in both directions

midpoint

midsegment (of a triangle)

median (of a triangle)

altitude

a point on a line segment that divides it into two equal parts…

a segment connecting the midpoints of two sides of a triangle.

a line segment joining a vertex to the midpoint of the opposin…

the height of an object or point in relation to sea level or g…

midpoint

a point on a line segment that divides it into two equal parts…

midsegment (of a triangle)

a segment connecting the midpoints of two sides of a triangle.

Congruent

Parallel

Perpendicular

Centroid

Two geometric figures with exactly the same size and shape.

Two lines in a plane that do not intersect or touch each other…

is the relationship between two lines which meet at a right an…

The center of a triangle where all medians meet.

Congruent

Two geometric figures with exactly the same size and shape.

Parallel

Two lines in a plane that do not intersect or touch each other…

Incenter

Circumcenter

Altitude

Circumcenter Theorem

The point of concurrency of the angle bisectors of a triangle

The point of concurrency of the perpendicular bisectors of a t…

Segment from a vertex to opposite side and it's perpendicular…

The circumcenter of a triangle is equidistant from the vertice…

Incenter

The point of concurrency of the angle bisectors of a triangle

Circumcenter

The point of concurrency of the perpendicular bisectors of a t…

point

line

plane

collinear

a point is a location

a line is made up of points and has no thickness or width

a plane is a flat surface made of points that has no depth and…

points that lie on the same line

point

a point is a location

line

a line is made up of points and has no thickness or width

bisector

angle

supplementary angles

Linear Pair

Something that cuts an object into two equal parts

A figure formed by two rays with a common endpoint

Two angles whose sum is 180 degrees

A pair of adjacent angles whose noncommon sides are opposite r…

bisector

Something that cuts an object into two equal parts

angle

A figure formed by two rays with a common endpoint

midpoint

line segment

line

ray

A point of a line segment that divides it into two congruent s…

A part of a line with two endpoints

one-dimensional figure that extends infinitely in both directi…

a part of a line that starts at one endpoint and extends forev…

midpoint

A point of a line segment that divides it into two congruent s…

line segment

A part of a line with two endpoints

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Point

Line

Plane

Collinear

A basic undefined term of geometry. Most points are represente…

A basic undefined term of geometry. A line is made up of point…

A basic undefined term of geometry. A plane is a flat surface…

When three or more points lie on a straight line.

Point

A basic undefined term of geometry. Most points are represente…

Line

A basic undefined term of geometry. A line is made up of point…

circumcenter

perpendicular bisector

bisect

centroid

The point of currency of the perpendicular bisectors of the si…

Bisects a segment and is perpendicular to it.

to cut exactly in half

The point of concurrency of the medians of a triangle

circumcenter

The point of currency of the perpendicular bisectors of the si…

perpendicular bisector

Bisects a segment and is perpendicular to it.

Segment Addition

Midpoint

Distance Formula

Midpoint Formula

If B is between A and C, then AB + BC = AC

If you have the midpoint, then the segments on each side are e…

Segment Addition

If B is between A and C, then AB + BC = AC

Midpoint

If you have the midpoint, then the segments on each side are e…

Polygon

Sum of the ∠'s in a Quadrilateral

Parallelogram

Rectangle

A closed figure formed by 3 or more coplanar sides. Each side…

The sum of the measures of all four angles of a quadrilateral…

If a quadrilateral is a Parallelogram, then both pairs of oppo…

If a parallelogram has four right angles, then it's a Rectangle

Polygon

A closed figure formed by 3 or more coplanar sides. Each side…

Sum of the ∠'s in a Quadrilateral

The sum of the measures of all four angles of a quadrilateral…