The lengths of the three sides of a triangle are 30 cm, 42 cm and x cm. Which of the following is correct?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 12 < x < 72.
Given that
The first side of a triangle is 30 cm
The second side of the triangle is x cm
The third side of the triangle is 42 cm
Formula used
(3rd side - 1st side) < second side < (3rd side + 1st side)
Calculation
⇒ (42 - 30) < x < (42 + 30)
⇒ 12 < x < 72