Question

Find the area of the triangle 2sides of which are 18cm and 10cm and the perimeter of the triangle is 42cm

Answer 1

if it's two of side is 18 and 10
And it's perimeter is 42 then it's third side will 14
area of triangle will be
= √21×(21-18)(21-10)(21-14)
= √21×3×11×7
= √7×3×3×11×7
= 21√11

Hence , 21√11 will be the answer