Question

Question #3d939

Answer 1

(a) acute

Explanation:

Let the 3 angles be `4x, 3x and 2x`.
`180^@ = 4x+3x+2x =9x`
`=> x=20^@`
So the 3 angles are `80^@,60^@, and 40^@`, respectively.
So the triangle is acute as all the 3 angles `< 90^@`