2.1 - 2.3 2025

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal in measure.

Front

Define 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

How do you find the measure of an angle when given two other angles?

Back

To find the measure of an angle, subtract the sum of the known angles from 180 degrees (for supplementary) or 90 degrees (for complementary).

Front

What is the vertex of an angle?

Back

The vertex of an angle is the point where the two rays (sides of the angle) meet.

Front

If angle HIJ = 164° and angle WIJ = 140°, what is angle HIW?

Back

Angle HIW = 24°.

Front

What is the relationship between adjacent angles?

Back

Adjacent angles are two angles that share a common side and a common vertex but do not overlap.

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.

Front

Define the term 'angle'.

Back

An angle is formed by two rays (sides) that share a common endpoint (vertex).

Front

What are the properties of vertical angles?

Back

Vertical angles are equal in measure and are formed by the intersection of two lines.