Question

two sides of a triangle triangle are 15 cm and 20cm , If the perimeter of the triangle is 55cm , find its third side.​

Answer 1

TWO SIDE OF TRIANGLE IS 15CM AND 20CM

PERIMETER OF TRIANGLE = 55CM

LET'S THIRD SIDE OF TRIANGLE = X

PERIMETER OF TRIANGLE = SUM OF ALL SIDE

55CM = 15CM + 20CM + X

55CM = 35CM + X

X = 55CM - 35CM

X = 20CM

HENCE THE THIRD SIDE OF TRIANGLE IS 20CM