Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 2 - No. 23)
Which of the following is a correct application of the formula for area of a triangle: Area = 1/2 * ab * sin C?
Knowing sides a = 5, b = 8, and angle C = 30 degrees
Knowing all three sides of the triangle
Knowing only the base and height of the triangle
Knowing sides a = 7, b = 9, and angle A = 60 degrees
Explanation
The formula requires the lengths of two sides and the *included* angle.
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