Question

Find the value of x​

Answer 1

Answer:

x= -12

Step-by-step explanation:

∠2= (180°-36°)÷2 (base ∠s of isos. △)

∠2= 72°

m∠2= x +84

72= x +84

x= 72 -84

x= -12

Answer 2

Answer:

The value if x is -12.

Step-by-step explanation:

Given that isosceles triangle have a same pair of angle. So in order to find the angles, you have to subtract it from 180° and 36°.

$θ + θ + 36 = 180$

$2θ = 180 - 36$

$2θ = 144$

$θ = 144 \div 2$

$θ = 72$

Next, the expression for ∠2 is x + 84 which is also 72°. So you have to solve it by comparing :

$x + 84 = 72$

$x = 72 - 84$

$x = - 12$