Question

One side of a parallelogram is 20cm and its perimeter is 70 cm. find other side of parallelogram?​

Answer 1

Answer:

15 cm

Step-by-step explanation:

Here's how -

Perimeter = 70 cm

One side = 20 cm

Opposite side = 20 cm

(opposite sides are parallel and equal)

Both sides = 20 + 20

Both sides = 40 cm

The other two sides = 70 - 40

The other two sides = 30 cm

One of the two sides = $\frac{30}{2}$

∴ The other side = 15 cm

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Answer 2

Given:

One side of a parallelogram is 20cm

perimeter is 70 cm

Let other side of parallelogram= x

perimeter of parallelogram=2(sum of its side)

70=2(20+x)

70=40+2x

2x=70-40

2x=30

x=30/2

x=15 cm

Hence the  other side of parallelogram is 15 cm