Question

area of rectangle 6cm and perimeter 10cm find the length of diagnol​

Answer 1

Classic Pythagoras 3 4 5 triangle but twice the size.

Pythagoras (for a right angled triangle) :- the square of the hypotenuse (10 here) equals the sum of the squares of the other two sides, 6, and the unknown side.

so by examination the unknown side is 8.

area is length times width, so 8 times 6 equals 48 sq cm..

mathematically we have :- 10 x 10 = (6 x 6) + unknown x unknown,

so 100 = 36 + unknown squared

therefore unknown squared = 100 - 36 = 64

square root of 64 is 8.

area is 6 x 8 = 48

Answer 2

Answer:

diagonal is equal to 3.6