Classifying and Solving Triangles

How many acute angles must an acute triangle have?

• 2

• 1

• 4

• 3

Solve for x.

• 7

• 9

• -11

• -6

If ▵ABC ⩭ ▵RQP, what is

the value of x?

• 3

• 2

• 6

• 13

Find the measure of the indicated angle. 

• 87 degrees

• 82 degrees

• 83 degrees

• 72 degrees

In triangle ABC, the m∠A = (21x - 1)°, the m∠B = (26x + 6)°, and m∠C = (11x + 1)°. What is the m∠B?

• 84°

• 34°

• 62°

• 90°

State whether the two figures are congruent.

• Yes, same size and same shape

• No, same shape but different sizes

• No, different size and different shapes

• Side WY

• Side DW

• Side DW

What is the value of angle c? (Do not worry about the degrees symbol - just type the number)

Which of the following is true?

These triangles are congruent. If ∠E is 45^o and ∠B is 55^o what is the measure of ∠C?

• 45^o

• 55^o

• 80^o

• 100^o