Geometric Concepts: Points, Lines, and Rays, angles

Front

What is a point in geometry?

Back

A point is a precise location or position in space, represented by a dot and has no size or dimension.

Front

Define a line in geometric terms.

Back

A line is a straight one-dimensional figure that extends infinitely in both directions and has no thickness.

Front

What is a ray?

Back

A ray is a part of a line that starts at a point and extends infinitely in one direction.

Front

What is an angle?

Back

An angle is formed by two rays that share a common endpoint, called the vertex.

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

What are complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect; they are always equal.

Front

What is the angle bisector?

Back

An angle bisector is a ray that divides an angle into two equal parts.

Front

If ∠XOZ is bisected by ray OY, what can be said about ∠XOY and ∠ZOY?

Back

∠XOY ≅ ∠ZOY.