Question

find the area and perimeter of a rectangle whose length is 4cm and the length of the diagonal is 5cm

Answer 1

Answer:

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Step-by-step explanation:

So one side is 4. and diagonal is 5

the diagonal and the base form part of a right angled triangle .. the other side being the second missing side of the rectangle.

so lets calculate it by pythagoras theorem:

5ˆ2 = 4ˆ2 + xˆ2 (x being missing side)

so xˆ2 = 9

or x = 3 (we choose positive solution as its a length of a side that cannot be -ve)

now we have 1 side = 4, other side = 3

so perimiter = 2*(4+3) - 14.

Answer 2

Answer:

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