Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 5 - No. 9)
If the angle between sides a and b is 90 degrees, what simplified formula could be used for the area of a triangle?
Area = 1/2 * a * b
Area = a * b
Area = 1/2 * a * b * sin(90)
Area = a + b
Giải thích
Area = 1/2 * a * b as sin(90) is 1