Question

The lengths of two sides of a triangle are 7 units and 9 units. Which of the following can be the measure of the third side?
a-19 units b-17 units c-13 units d-2 units​

Answer 1

Answer:

13 units

Step-by-step explanation:

Sum of 2 sides of a triangle is always greater than the third side.

if the 3rd side is 19 units, the sum of 9 & 7 will be less than 19

if the 3rd side is 17 units, the sum of 9 & 7 will be less than 17

if the 3rd side is 2 units, the sum of 7 & 2 will be equal to 9

but if the 3rd side is 13 units, then the sum of 7 & 13 is greater than 9 ; the sum of 9 & 13 is greater than 7 ; the sum of 9 & 7 is greater than 13.

So, answer = 13 units.

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