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What is the measure of ∠R?

What is the measure of ∠R?
asked 128k views
3 votes
What is the measure of ∠R?

What is the measure of ∠R?-example-1
asked
User Xiaoqiong
by
7.9k points

1 Answer

1 vote

Answer:

∠ R ≈ 36.9°

Explanation:

using the cosine ratio in the right triangle.

cos R =
(adjacent)/(hypotenuse) =
(RT)/(RS) =
(8)/(10) = 0.8 , then

∠ R =
cos^(-1) (0.8 ) ≈ 36.9° ( to 1 decimal place )

answered
User Arsene
by
8.3k points
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