#### Answer

$T=24$ square cm.

#### Work Step by Step

The area of this figure can be calculated as the sum of the area of the square and the area of the parallelogram.
$T=T_1+T_2$
Square:
$T_1=a^2$
$T_1=3^2=9$ square cm.
Parallelogram:
$T_2=h\times a=5\times 3=5\times 3=15$ square cm
$T=T_1+T_2=9+15=24$ square cm.