Question

The perimeter of a square is 40 cm. What will be the length of its diagonal?

Answer 1

perimeter of square = 4a = 40

4a=40

a= 40/4

a= 10cm

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Answer 2

✰✰|| Given ||✰✰

• Perimeter of square = 40cm

✰✰|| To Find ||✰✰

• Diagonal of square

✪|| Solution ||✪

Perimeter of square = 40cm

⇒ side × 4 = 40cm

⇒ side = 40cm/4

⇒ side = 10cm

we know that l² + b² = d²

l² + b² = d²

→ ( 10cm )² + ( 10cm )² = d²

→ 100cm² + 100cm² = d²

→ 200cm² = d²

→ √200cm² = d

→ 14.4 cm = d

14.4 cm is length of its diagonal