Question

The diagonal of a rectangle is 5 cm and one of at sides is 4 cm. Its area is
a) 20 sq.cm. b) 12 sq.cm. c) 10 sq.cm. d) none of these​

Answer 1

Answer:

12 sq.cm

Step-by-step explanation:

1. In a rectangle we get two right angled triangles
2. If diagonal is taken as hypotenuse then its length=5cm
3. If one side is taken as base then=4cm
4. ${ac }^{2} = {bc}^{2} + {ab}^{2}$
5. ${5}^{2} = {4 }^{2} + {x}^{2}$
6. then x= 3 takeit as width
7. then area of rectangle =l×b
8. A=4×3
9. A= 12sq.cm