Topic 5 Review

Front

If an isosceles triangle has a base angle measuring 40°, what is the measure of the vertex angle?

Back

100°

Front

What is the measure of ∠A if it is given that ∠A = 88°?

Back

88°

Front

What is the missing angle in a triangle if the other two angles are 45° and 90°?

Back

45°

Front

If two sides of a triangle are congruent, what can be said about the angles opposite those sides?

Back

The angles opposite those sides are congruent.

Front

Use the Exterior Angle Theorem to find the value of x if the exterior angle is 149°. What is x?

Back

x = 149°.

Front

What is the sum of the interior angles of a triangle?

Back

180°.

Front

In an isosceles triangle, if the two equal sides are each 10 cm, what is the length of the base if the vertex angle is 40°?

Back

The base length can be calculated using the Law of Cosines.

Front

What is the relationship between the angles in a triangle?

Back

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

Front

What is the definition of an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What is the definition of congruent angles?

Back

Angles that have the same measure.