Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 2 - No. 48)
A parallelogram has adjacent sides of 8 cm and 10 cm. The angle between them is 30 degrees. What is the area of the parallelogram?
40 cm²
80 cm²
20 cm²
60 cm²
Explanation
Area = base * height. The height is 10sin(30) cm. 8* 10* sin(30) = 40cm².