the sum of the measures of the three of a angles of triangle is 180. In a triangle, the measures of three angles are x,x-5 and x
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For this case we have the following functions:
By definition of composition of functions we have to:
So:
By definition of division of powers of the same base we have to place the same base and subtract the exponents:
ANswer:
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<em>Correction to your question text: diameter, not radius.</em>
The area of a circle is given by:
The radius is half of the diameter.
Substitute and solve.