Question

Find the area of an isosceles right triangle whose base is 30 cm

Answer 1

1/2*30*30 = 900/2 = 450 , there is no option so the base is Hypotenuse,

Now,

Let the side = x,

=> x²+x² = 30²
=>2x² = 30²
=>x² = 15*30
=> x² = 5*3*3*5*2
=> x² = 5²*3²*2
=> x = 5*3*√2 = 15√2,

now area = 1/2*15√2*15√2
=> 1/2 * 225 * 2

=> 225 sq cm,

Therefore the answer is ,

225 sq cm,