The angles of a triangle are in ratio 2
The angles of a triangle are in ratio 2
A: 20°; 70°; 90°
B: 18°; 63°; 99°
C: 23°; 54°; 110°
D: 26°; 66°; 88°
Step 1 Ratio total = 2+7+11 = 20. Step 2 Sum of angles in a triangle = 180°. Step 3 Value of each part = 180 ÷ 20 = 9°. Step 4 Angles = 2×9 = 18°; 7×9 = 63°; 11×9 = 99°. Step 5 So the angles are 18°; 63°; and 99°.