Asked by Kate

Find the perimeter of a pentagon circumscribed about the circle that has a radius of 1.5 units.
Answered by Steve
consider the pentagon as 5 isosceles triangles, each with vertex angle of 72°, and sides of 1.5 (the radius).

Now you can easily calculate the base of each triangle. The perimeter is 5 times that.
Answered by Kate
Thank you, Steve!!
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