area and perimeter.

Hi Rosa;

(b)(b)=25 cm

^{2}b

^{2}=25 cm^{2}√(b

^{2})=√(25 cm^{2})b= 5 cm

Please note the square root of 25 was taken, as well as the square root of cm

^{2}.Perimeter=4b

Perimeter=4(5 cm)

Perimeter=20 cm