Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 1 - No. 2)
Which formula is most applicable if you want to calculate the area of a triangle if you know the lengths of two sides and an angle?
A = 1/2 * b * h
A = 1/2 * a * b * sin C
Pythagoras' Theorem
Sine rule
Vysvětlení
The formula 1/2*ab*sinC utilizes two sides and the included angle.