The ratio of three angles of a triangle is 1 : 3 : 5. Which is the measure of the greatest angle?
Answer & explanation
Correct answer: option 1
We know that,
Sum of all angles = 180°
We have,
The ratio of three angles of a triangle is 1 : 3 : 5.
x + 3x + 5x = 180°
= 9x = 180°
= x = 20°
The greatest angle = 5x = 5 × 20° = 100°