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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˚

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˚
asked 221 views
1 vote
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˚

asked
User Abhijit Mondal Abhi
by
8.1k points

1 Answer

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

A is your answer
answered
User Jonathan Tonge
by
8.2k points
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If m∠4 = (3x)° and m∠8 = (x + 40)°, what is the measure of ∠4? ∠4 and ∠8 are vertical.
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