Parallelogram F C D E is shown. Sides D C and F E are parallel, and sides F C and E D are parallel. The length of C D is 4 r + 19, the length of D E is 8 r + 3, and the length of F C is 9 r minus 6.
What is the value of r?

What is the length of segment EF?

units

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step-by-step explanation:

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answerthe vertex form

step-by-step explanation:

step-by-step explanation :

we know that

the measurement of the outer angle is the semi-difference of the arcs which comprises

in this problem

m< xzy is the outer angle

substitute the values

the measure of angle xoy is equal to

> by central angle

substitute the value