kim2001
contestada

If  m∠4 = (3x)° and m∠8 = (x + 40)°, what is the measure of ∠4?
∠4 and ∠8 are vertical.

A.
20˚
B.
60˚
C.
40˚
D.
120˚

Respuesta :

lizzyvet1
vertical angles are opposite angles and therefore equal
3x = x + 40
-x     -x
2x = 40
---   -----
2      2
x = 20

A is your answer

Otras preguntas