Basic Geometry Assumptions

Front

Two angles that form a linear pair are ______________.

Back

supplementary.

Front

The sum of the measures of all adjacent angles around a point is

Back

360 $\degree$

Front

Back

Front

In the diagram below, 𝐵𝐶̅̅̅̅ is the bisector of ∠𝐴𝐵𝐷, which measures 60°. What is the measure of ∠𝐴𝐵𝐶?

Back

30°

Front

In the diagram, ̅𝐷𝐶̅̅̅ is the perpendicular bisector of ̅𝐴𝐵̅̅̅, and 𝐶𝐸̅̅̅̅ is the angle bisector of ∠𝐴𝐶𝐷. Find the measures of 𝐴𝐶̅̅̅̅ and ∠𝐸𝐶𝐷.

Back

Front

Back

Front

When one angle of a triangle is a right angle, the sum of the measures of the other two angles is ______________.

Back

90°

Front

Which reason is NOT needed when proving the exterior angle of a triangle property? Options: Linear pairs are supplementary, Vertical angles are equal, Sum of the measures of the angles of a triangle is 180°

Back

Vertical angles are equal.

Front

The triangle in this figure is isosceles. How do we know this?

Back

The base angles are equal.

Front

If a transversal intersects two parallel lines, then the measures of the _________________ angles are equal. Which word or phrase makes this statement false? Options: corresponding, alternating interior, alternating exterior, same-side interior.

Back

same-side interior