Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 6 - No. 26)
If two sides of a triangle are 6 cm and 12 cm, and the angle between them is 30 degrees, calculate the area of the triangle.
18 cm²
36 cm²
72 cm²
none of these
Explication
Using the formula 1/2 * a * b * sin C, Area = 1/2 * 6 * 12 * sin(30) = 18 cm²