Given: PQRS is a parallelogram;

Prove: QRT is isosceles​

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

answer is c

step-by-step explanation:

81/12=324/x

x=48

i think the answer is 90 hope this

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