A triangle has sides that measure 4 units, 6 units, and 7.21 units. What is the area of a circle with a circumference that equals the perimeter of the triangle? Use 3.14 for π, and round your answer to the nearest whole number.

17 units2
24 units2
54 units2
94 units2

perimeter = 4 + 6 + 7.21 = 17.21

circumference C=17.21

C = 2πr

so

r = C/2π

Area

A = πr² =  π(C/2π)² = C²/4π

A = 17.21²/(4×3.14) = 23.5815366...

24 square units, second choice

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing im pretty sure that is the right answer

step-by-step explanation: