If the angles of a triangle are in the ratio 7 : 8 : 3, then the value of the largest angle is:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. .
Let the angles of the triangle be 7x, 8x, and 3x.
The sum of the angles in a triangle is always 180°.
So, 7x + 8x + 3x = 180°
⇒ 18x = 180°
⇒ x = 180°/18 = 10°
⇒ 8x = 8 × 10° = 80°
Therefore, the largest angle is 80°.