Question

- ABC is a triangle in which AB = AC = 4 cm and angleA = 90°. Calculate the area of A ABC. (ICSE)​

Answer 1

Answer:

AB = AC = 4 units [both 2 radii]

Angle A = 90° [conisder as Centre Angle=Ф ]

Use Area of Sector formula-

Ф/360° * πr²

60/360° * 22/7 * 4²

⇒ 1/6 * 22/7 * 16

⇒ 1/3 * 22/7 * 8

⇒ 1/3 * 25.14

⇒ 8.38 unit²

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