What is the length of XPY in terms of pi?
2 answers:
Circumference = 2 x PI x r
= 2 x 3.14 x 30 = 60 PI
the area from x to y = 90 degrees
so XPY would be 360 - 90 = 270 degrees or 3/4 of a full circle
so XPY = 60 x 3/4 = 45 PI meters
Circumference of a circle = 2πr
Circumference of the whole circle= 2π(30) = 60π
360 - 90 = 270
Length XPY = 270/360 x 60π = 45π
Answer: 45π m
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