Question

Solve number 20

traingle ABC with C=90 slove for the missing part

PLEASE HELP!!​

Answer 1

A ≈ 69.5°

Explanation:

Given the triangle is right use the cosine ratio to find A

cosA =
`(adjacent)/(hypotenuse)` =
`(AC)/(AB)` =
`(2.7)/(7.7)`, thus

A =
`cos^(-1)` (
`(2.7)/(7.7)` ) ≈ 69.5° ( to 1 dec. place )