Question

7. If s is the side of a regular pentagon, represent the perimeter of the pentagon as an algebraic expro
sion. Find the perimeter when s = 5 cm.
8. If length (1) of a rectangle is 2 cm less than twice its breadth (b). Find the expression for the length
of the rectangle. Find the perimeter (P) of the rectangle when b=5 cm.​

Answer 1

Answer:

Let,the length is be ‘x’

The breath is 2x

According to question :-

2(l+b)=18

=)2(x+2x)=18

=)x+2x=18/2

=)3x=9

=)x=9/3

=)x=3

The length is= 3

The breth is =2×3=6

HOPE THIS HELPS YOU

MARK AS A BRANALIST

Answer 2

Answer:

Your Answer Is

7) P = 5s, 25 CM

8) 1 = 2b - 2