The length of each equal side of an isosceles triangle is 15 cm and the included angle between those two sides is 90º. Find the area of the triangle.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e 225/2 cm2
The area of the triangle = (1 / 2)a × b × sinθ
⇒ (1 / 2) × 15 × 15 × sin90o
⇒ (225 / 2)cm2