Question

42. If two perpendicular sides of a right-angled triangle are 5 cm and 12 cm, its perimeter is ​

Answer 1

Answer:

30 cm

Step-by-step explanation:

Perimeter = Sum of all sides

Let third side = x

Using Pythagoras Theorum

(x)² = (5)² + (12)²

x² = 25 + 144

x² = 169

x = 13

Perimeter = 5 + 12 + 13 = 30 cm ( Answer )