pls help i will give brainliest. use the examples step to solve the problems,it's my second time posting this

Answer:
A=144cm2,B=33cm2,C=18cm2,D=21.98cm2
Step-by-step explanation:
A=12*12
B=11*3
C=1/2*4*9
D=π*7cm2. (π = 3.14