Question

1) m2 = 3x - 6
120 X
2.
A) 12
C) -11
B) 10
D) 6

Answer 1

A

Explanation:

Since the 2 legs are congruent then the triangle is isosceles and therefore the base angles are congruent, that is

∠ 2 =
`(180-120)/(2)` =
`(60)/(2)` = 30° , thus

3x - 6 = 30 ( add 6 to both sides )

3x = 36 ( divide both sides by 3 )

x = 12 → A