3 years ago

Find the measure of angle B A.95 B.48 C.15 D.12 E.84

Mathematics

1 answer:

ryzh [129]3 years ago

5 0

Answer:

Step-by-step explanation:

side AB is congruent to side AX

this means that the angle ∠A = 4x is the same angle as ∠Z

therefore ∠A = ∠Z = 4x

inside angle of a triangle = 180

∠A + ∠B + ∠Z = 180

4x + 7x + 4x = 180

15x = 180

x = 180/15

x = 12

now substitute x = 12 into angle B

∠B = 7x

∠B = 7 (12)

∠B = 84

therefore, the answer is E) 84

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