Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 4 - No. 6)
In a triangle, given two sides and their included angle, which formula should you use to find the area?
Area = 1/2 * a * b * sin(C)
Area = 1/2 * base * height
Area = √s(s-a)(s-b)(s-c)
Area = (a * b * c) / (4R) (where R is the circumradius)
설명
The formula requires the two known sides and the angle between them.