25 terms

Acute angle

An angle with a measurement greater then 0 degrees and less then 90

obtuse angle

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

right angle

an angle that measures 90 degrees

straight angle

an angle that measures 180 degrees

acute triangle

A triangle that contains only angles that are less than 90 degrees.

obtuse triangle

A triangle with one angle that is greater than 90 degrees.

right triangle

A triangle that has a 90 degree angle.

point

an exact location in space that is represented by a dot

Rays

A part of a line that has one end point and extends in one direction without ending

Line

Straight set of points that extend in opposite directions without ending

Line segment

Part of a line between 2 end points. The length of the line segment can be measured.

Intersecting lines

Lines that meet or cross a point

Perpendicular lines

Lines that meet or cross each other to form right angles

Parallel lines

Lines that are always the same distance apart. They do not intersect.

Parallelogram

Opposites sides equal in length

Parallel

Opposite angles have same size

Parallel

Opposite angles have same size

rectangle

Opposite sides are equal in length and parallel

Has 4 right angles

Has 4 right angles

Rhombus

4 equal sides

Opposite sides equal in length and parallel

Opposite sides equal in length and parallel

Square

Opposite sides equal in length and parallel

4 right angles

4 equal sides

4 right angles

4 equal sides

Trapezoid

A quadrilateral with exactly one pair of parallel sides

A rectangle, square, and rhombus are all parallelograms.

...

A square has same attributes as a rectangle...

It can be classified as a rectangle.

A rectangle CANNOT be a square

Because it does NOT have 4 equal sides

Polygon

A closed plane figure made up of line segments

Polygon examples

Pentagon, hexagon, octagon

quadrilateral

Has 4 sides and 4 angles

Ex is square, rectangle, parallelograms, rhombus

Ex is square, rectangle, parallelograms, rhombus