Answer:
b= 69
Step-by-step explanation:
total inside angles = 900
because (7-2)*180 = 900
plus them all and set it = 900
you will get b= 69
Answer:
the answer is to the question is b
Answer: 48cm
Step-by-step explanation:
Using the formula
P=2(l+w)
Solving for l
l=P
2﹣w=120
2﹣12=48cm