Answer:
First and third are the correct answers.
16
Step-by-step explanation:
5-2=3+1=4*3=12+4=16
34
first of all use formula:
n(AUB)=n(A)+n(B)-n(AnB)
0.94444444444
18 centimeters
The formula for finding the perimeter is side + base+side . There for you do 6+6+6
that gives you 18
