Question

find the length of the diagonal of a rectangle with dimensions 20mby 15

Answer 1

Answer:

Step-by-step explanation:

Given ,

length of a rectangle = 15 cm

breadth of a rectangle = 15 cm

the length of a diagonal = ?

     AB=15m

     BC=20m

     AC=?

= √(20² + 15²) m

= √(400 + 225) m  

= √625 m  

= √(25 × 25) m  

= 25 m

Hence, the length of a diagonal of rectangle is 25m.

Answer 2

Answer:

25m

Step-by-step explanation:

Consider the length and breadth of this rectangle as the height and the breadth of a right angle triangle respectively. In such a case we will then consider the diagonal of this rectangle to be the triangle's hypotenuse. To find hypotenuse we use pythogaras theorem i.e :-

hy² = h² + b²

      = 20m² + 15m²

      = 400m + 225m= 625m

hy   = √625m

      = 25m