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Is anyone good with Vertex Angles? i need help

Is anyone good with Vertex Angles? i need help-example-1

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Answer:

t=5

Explanation:

Vertical angles are congruent

So we put the value equivalent to each other

110=4t+90

Isolate t

110=4t+90

-90 -90

20=4t

Divide to isolate t

20/4=4t/4

5=t

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