Question

Find the length of diagonal of a rectangle whose sides are 15 cm and 8 cm?

Answer 1

Here is your answer

Length = 15 cm
Breadth = 8 cm
Let the Diagonal is x cm


AS we know that the all angles of the rectangle are 90°
So
Diagonal^2 = L^2+B^2

${x}^{2} = (15) {}^{2} + 8 {}^{2} \\ {x}^{2} = 225 + 64 \\ { x}^{2} = 289 \\ x = \sqrt{289} \\ x = 17 \: cm$
Therefore Diagonal of the rectangle is 17 cm

Hope it helps you

Answer 2

$<b><i>$
Hey Mate!!

As we know the formula,

D^2 = L^2+B^2

$d {}^{2} = 15 {}^{2} + 8 {}^{2} \\ d {}^{2} = 225 + 64 \\ d = \sqrt{289} \\ d = 17 \: cm$

So Diagonal is 17 cm

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