Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 2 - No. 18)
In a right-angled triangle, which of the following must be known in order to calculate the length of a missing side?
The length of two sides.
The measure of one angle.
The length of one side and one angle.
The area of the triangle.
Explanation
You need either two sides or one side and an angle to solve.
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