Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 2 - No. 24)
What is the key to calculating the area of a non-right-angled triangle when you know two sides and their included angle?
The Law of Sines
The Law of Cosines
Area = 1/2 * a * b * sin C
The Pythagorean Theorem
Explanation
The formula 1/2 * a * b * sin C is applied.
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