Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 1 - No. 28)
If two sides of a right-angled triangle are 5cm and 12cm, what is the length of the third side?
13 cm
17 cm
7 cm
60 cm
คำอธิบาย
Using Pythagoras' theorem, sqrt(5^2 + 12^2) = 13