Dilation and Angle Relationships

Front

What are Vertical Angles?

Back

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

Front

What does it mean for two figures to be congruent?

Back

Two figures are congruent if they have the same shape and the same size.

Front

What are Congruent Angles?

Back

Congruent angles are angles that have the same measure.

Front

What are Supplementary Angles?

Back

Supplementary angles are two angles that add up to 180°.

Front

If angle 3 is 70°, what is a supplementary angle to angle 3?

Back

110° (because 70° + 110° = 180°).

Front

What is the sum of the angles in a triangle?

Back

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

Front

What are Adjacent Angles?

Back

Adjacent angles are two angles that share a common side and a common vertex.

Front

What is the relationship between complementary angles?

Back

Complementary angles are two angles that add up to 90°.

Front

If two angles are vertical angles, what can we say about their measures?

Back

Their measures are equal.

Front

What is the definition of a right angle?

Back

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