Answer
The yellow triangle has a perimeter of 63 ft and an area of 180 ft$^2$. The pink triangle has a perimeter of 32.4 cm and an area of about 45.1 cm$^2$.
Work Step by Step
yellow triangle:
P=18+21+24=63 ft
A=0.5(24)(15)=180 ft$^2$
pink triangle:
P=9.5+13.4+9.5=32.4 cm
A=0.5(9.5)(9.5)$\approx$45.1 cm$^2$
