Question

Find the length of the diagonals of a rectangle whose sides are 4cm and 3cm

Answer 1

Length = 4 cm
Width = 3 cm
Diagonal = $\sqrt{ Length^{2}+ Width^{2} }$
Diagonal = root 4^2 + 3^2
               = root 16 + 9
               = root 25
               = 5 cm

Answer 2

Now we know that Rectangle can be divided into two right angled triangles let us take one of the triangles as ABC and now
Apply Pythagoras theorem
(AC)^2=(AB)^2+(BC)^2
AC=_/25=5cm

Ans:-Diagonals of a rectangle are 5cm (diagonals of a rectangle are equal.

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