Question

If the length of two sides of a triangle is 3cm and 7cm,then what is the length

of third side?​

Answer 1

Step-by-step explanation:

An isosceles triangle has two sides that are the same length, so the answer is already narrowed down to either 3 cm or 7 cm. Moreover, the sum of any two sides of a triangle added together has to be greater than the third side.

If you were to guess that the unknown side was 3 cm, you could not form a triangle because 3+3<7. This means that the third side would be 7 cm long.

Answer 2

Answer:

Side of triangle=3cm and 7cm

Sum of these two sides = 10

Perimeter= 15cm

Third side = perimeter - Sum of two sides

Third side= 15-10

5 cm

Answer= Third side 5cm