5.2 Perpendicular and Angle Bisectors

Front

What is a perpendicular bisector?

Back

A line that divides a segment into two equal parts at a 90-degree angle.

Front

If DE = 4, what is GE if DE is a segment of a triangle?

Back

GE = 8, since DE is half of GE.

Front

What is an angle bisector?

Back

A ray that divides an angle into two equal angles.

Front

If ∡K is 41°, what is the measure of ∡HJK if it is supplementary to ∡K?

Back

∡HJK = 180° - 41° = 139°.

Front

If GF = 9, what is FE if GF is a segment of a triangle?

Back

FE = 9, since GF is equal to FE.

Front

What is the relationship between angles formed by perpendicular lines?

Back

They form four right angles (90° each).

Front

If ∡K is 41°, what is the measure of ∡L if it is equal to ∡K?

Back

∡L = 41°.

Front

What is the sum of angles in a triangle?

Back

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

Front

If GD = 8, what is DE if GD is a segment of a triangle?

Back

DE = 8, since GD is equal to DE.

Front

What is the definition of complementary angles?

Back

Two angles that add up to 90°.