Tips & Tricks Since the angles of the triangle are in the ratio 5 : 3 : 10. Let the common factor be x We know Sum of all angles of a triangle = 180° ∴ 5x + 3x + 10x = 180° ⇒ 18x = 180° ∴ x = 10° Largest angle = 10 × 10 = 100° Smallest angle = 3 × 10 = 30° Difference = 100° - 30° = 70°