Answer:
456 sq. units
Step-by-step explanation:
Formula for the area of the square:
b(base)*h(height)
b=21
h=16
21*16=336
Formula for the area of the triangle:
b*h/2
b=36-21=15
h=16
15*16/2=120
Add the two shaped together:
336+120=456
Label your answer: 456 sq. units
