10 pts!! Multiple choice question (triangles)! Explain how you got your answer!

Option A:

R = 109°

Solution:

Given data:

p = 31 cm, r = 67 cm and ∠P = 26°

To find the measure of angle R.

Using law of sines,

Switch the sides.

Multiply by 67 on both sides, we get

sin R = 0.9474

R =71.34 + 360n, 108.65+ 360n, for any integer n

Here R is an obtuse angle, so ignore 71.34.

R = 108.65°

R = 109°

Option A is the correct answer.

v: l•w•h÷2.

v: 20•6•8 ÷2

v: 960÷2

v: 480

answer

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