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Geometry Definitions

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Section 1

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Supplementary Angles

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Geometry Math

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Date created

Mar 1, 2020

Cards (29)

Section 1

(29 cards)

Supplementary Angles

Front

Two angles whose sum equals 180 degrees.

Back

Area

Front

The amount of surface inside a 2-dimensional shape. This can be calculated by multiplying its length by its width.

Back

Plane

Front

a flat surface that extends infinitely in all directions

Back

Skew Lines

Front

Two lines that do not intersect and are not parallel.

Back

Height

Front

The vertical distance from top to bottom.

Back

Surface Area

Front

The area of all the outer surfaces of something that is 3-dimensional (ex: a cube).

Back

Angle

Front

Two rays that share one endpoint.

Back

Coplanar

Front

Are lines that lie on the same plane.

Back

Ray

Front

A part of a line that has exactly one endpoint.

Back

Endpoint

Front

A point at the end of a ray.

Back

Hypotenuse

Front

The side opposite the right angle in any right triangle. The hypotenuse is the longest side of any right triangle.

Back

Parallel Lines

Front

Two lines that always stay the same distance apart. We can never touch.

Back

Perimeter

Front

The length around a 2-dimensional, flat shape (ex: width + width + length + length).

Back

Perpendicular Lines

Front

When two lines meet, they form right angles.

Back

Obtuse Angle

Front

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

Back

Midpoints

Front

A point that splits a segment into two equal parts.

Back

Right Angle

Front

An angle that measures 90 degrees.

Back

Point

Front

This shows an exact location. It has no size, only position.

Back

Segment Bisector

Front

Any segment, line, or plane that divides a segment into two congruent parts.

Back

Opposite Ray

Front

A ray that goes in an opposite direction from a vertex.

Back

Congruent

Front

Having the same size and shape.

Back

Complementary Angles

Front

Two angles whose sum equals 90 degrees.

Back

Collinear

Front

points that lie together on the same plane.

Back

Acute Angle

Front

An angle that measures less than 90 degrees.

Back

Intersection

Front

The point where two lines cross, or the line where two planes cross.

Back

Line

Front

This has no beginning point or endpoint. It continues forever in both directions.

Back

Straight Angle

Front

An angle that measures 180 degrees.

Back

Line Segment

Front

When two endpoints are connected with a straight line.

Back

Vertex

Front

The point where two lines meet to make an angle. The point where sides or edges meet.

Back