1 Answer

Bhavesh Ghodasara · Answer 1 · 2020-01-14T20:33:38+0000

Answer:

∠R ≈ 46.4°

Explanation:

Since the triangle is right we can use the tangent ratio to calculate ∠R

In relation to ∠R

TI is the side opposite

RT is the adjacent side and RI is the hypotenuse

tan R =
(opposite)/(adjacent) =
(21)/(20) , hence

R =
tan^(-1) (
(21)/(20) ) ≈ 46.4°

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