If the three sides of a triangle are 21 cm, 20 cm and 29 cm long, what is the area of the triangle?
Answer & explanation
Correct answer: option 1
We know that the triangle with 21 cm, 20 cm and 29 cm sides is a right angle triangle.
So, the area = \(\frac{1}{2}\) × Base × Height
= \(\frac{1}{2}\) × 20 × 20 = 210 cm2