Question

. Find all values of x that will make ∠A an obtuse angle given
m∠A = 12x - 6

Answer 1

(8, 15]

Explanation:

If ∠A is bigger than 90 then that means 12x-6 > 90

12x > 96

x > 8

and we know that the angle must be between 0 and 180. so 12x < 186

x <= 15