Answer
Area of the Triangle = $A$ = 302.46 cm$^{2}$
Perimeter of the Triangle = $P$ = 85.2 cm
Work Step by Step
Area of a Triangle: $A$ = $\frac{1}{2}$$b$$h$
Therefore:
$A$ =$\frac{1}{2}$(21.3 cm)(28.4 cm)
$A$ = 302.46 cm$^{2}$
Perimeter of a Triangle: $P$ = $a$ + $b$ + $c$
Therefore:
$P$ = 35.5 cm + 21.3 cm + 28.4 cm
$P$ = 85.2 cm
