Question

Using Pythagoras' theorem, calculate the length of the hypotenuse in this right-angled triangle.

Give your answer in centimetres (cm) to 1 d.p.
8 cm
3.9 cm

Answer 1

hypotenuse = 8.9 cm

Explanation:

according to the Pythagoras theorem,

h² = a² + b²

h = √a² + b²

by substituting the given values,

h = √8² + 3.9²

= √64 + 15.21

= √79.21

= 8.9

thus, the hypotenuse of the right-angled triangle, h = 8.9 cm