180 - ( 10x -3) is your answer
Answer:
a) As sides of squares are always equal.
So,
BC=CD
2b+CF=a+b
CF= a+b-2b
CF= a-b
b) Area of rectangle CDEF= CDxCF
=(a+b)(a-b)
=(a²-b²)
Hope it helps :-)
7- B
8- C
I’m pretty sure please don’t hurt me if I’m wrong
