Question

PLssssssssss help me what is the approximate measurement of R

Answer 1

∠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°