Question

∠A and ​ ∠B ​ are vertical angles with m∠A=x and m∠B=3x−60 . What is m∠A ? Enter your answer in the box.

Answer 1

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Answer 2

we know that

Vertical angles are congruent angles opposite each other where two lines cross

so

in this problem

m∠A=m∠B

so

substitute the values

`x=3x-60\\3x-x=60\\2x=60\\x=60/2\\x=30\°`

therefore

the answer is

The measure of angle A is
`30\°`