Mr. Fawcett is building a ramp for loading motorcycles onto a
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Answer:
x=25
Step-by-step explanation:
we know that
The <u><em>triangle external angle theorem</em></u> states that: An exterior angle of a triangle is equal to the sum of the opposite interior angles
In this problem
m∠9=m∠7+m∠8
substitute the given values
solve for x