A sector has perimeter 7 cm and area 3 cm^2. Find its radius

perimeter-radius

#1

A sector has perimeter 7 cm and area 3 cm^2. Find its radius.

Answer:

P=D x pie, so 7=(2r)pie
A=pie x r^2, so 3= pie x r^2

just solve either one and get the radius ®
3/pie = r^2
0.955 = r^2
take the square root of both sides and r = about 0.977
i am finding that the parameter can’t be 7 in this problem because if you plug the radius into the parameter function, it doesn’t equal 7, so either the parameter or the area is wrong here