Question

Help me with this question

Answer 1

∆QRS is an obtuse triangle

Explanation:

`x + 2x + 8x - 40 = 180 \\ 11x = 220 \\ x = 20`

`< q = 20 \\ < r = 8(20) - 40 = 120 \\ < s = 2(20) = 40`

<R = 120° > 90° which makes this an obtuse triangle