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## Answers

__41cm is the diagonal and 40cm is the length.__

*The diagonal of the rectangle divides it into two right-angled triangles, so we can use the pythagorean theorem to solve this problem.*hyp² = length² + breadth²

41² = 40² + breadth²

1681 = 1600 + breadth²

1681 - 1600 = breadth²

breadth² = 81

breadth = √81

=

**9cm**

Perimeter = 2( l + b )

= 2 * (40 + 9)

= 2 * 49

=

**98cm**

__The perimeter of the rectangle is 98cm.__

Then AC will be diagonal. And angle B = 90.

Length(BC) = 40 cm

diagonal(AB) = 41 cm

By using pythagoras theorem, we have:-

Now, Perimeter of rectangle = 2(L+B) = 2(BC+ AB)

= 2(9 + 40) = 2(49)

= 98 cm