Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 3 - No. 28)
In the context of a three-dimensional rectangular prism, what formula is used to calculate the length of the diagonal?
d = a + b + c
d = √(a² + b² + c²)
d = 2(ab + bc + ca)
d = (a² + b² + c²) / 2
คำอธิบาย
The correct formula is d = √(a² + b² + c²).