Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 6 - No. 49)
What is the relationship between the lengths of the sides in a 45-45-90 triangle?
All sides are equal.
The hypotenuse is twice the length of a leg.
The legs are equal, and the hypotenuse is √2 times the length of a leg.
The hypotenuse is equal to the sum of the legs.
Giải thích
In a 45-45-90 triangle, the legs are equal, and the hypotenuse = leg * √2