Question

The semi perimeter of a triangle having lengths of two sides as 12cm and 15cm is 21cm. Find the length of the third side.​

Answer 1

Step-by-step explanation:

The sum of the length of any two sides is always greater than the third side. From the question, it is given that two sides of triangle are 12 cm and 15 cm. So, the third side length should be less than the sum of other two sides, 12 + 15 = 27 cm.

Answer 2

Step-by-step explanation:

HEY MATE YOUR ANSWER IS HERE ^_^

LET THIRD SIDE BE X THEN,

(12 + 15 + X)/2 = 21

27 + X = 42

X = 15 cm

PLEASE MAKE ME A BRAINLIEST ANSWER FOR THE QUESTION.