Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 5 - No. 34)
What information is necessary to apply the formula A = 1/2 * a * b * sin(C) for finding the area of a triangle?
The lengths of sides 'a' and 'b'
The measurement of angle C
The length of side c.
The measure of angle A
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We need the lengths of two sides and the angle in between.