Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 4 - No. 39)
If a right-angled triangle has sides of length 3 cm and 4 cm, what is the length of the hypotenuse?
5 cm
6 cm
7 cm
25 cm
Explicaţie
Using Pythagoras' theorem: 3^2 + 4^2 = c^2 => 9 + 16 = c^2 => 25 = c^2 => c = 5.