Set 3: Triangles (Beginner)

**Choice B is the best answer.** Third angle = 180 - 49 - 77 = 54 degrees

Explanation

Answer: B

PROBLEM

A triangle has angles of 49 degrees and 77 degrees. What is the third angle?

A.

57

B.

54

✓ Correct

C.

53

D.

55

Detailed Explanation

Choice B is the best answer. Third angle = 180 - 49 - 77 = 54 degrees

Why others are wrong:

A: 57 is incorrect because it does not satisfy the equation.

C: 53 is incorrect because it does not satisfy the equation.

D: 55 is incorrect because it does not satisfy the equation.