Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 7 - No. 6)
To use the formula Area = 1/2 * ab * sin C, which elements must be known?
The measure of angle C
The lengths of sides a and b
The length of side c
The perimeter
הֶסבֵּר
The area formula uses lengths of two sides and the included angle.