Question

If the diagonal of the rectangle is 10cm.and one side is 6 cm. Then the area of triangle is-​

Answer 1

*Answer:

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 squaredtherefore unknown squared = 100 - 36 = 64square root of 64 is 8.area is 6 x 8 = 48