Angles (With their Types) — MATHS STD 6 — Question
ICSE BoardEnglish MediumSTD 6MATHSAngles (With their Types)3 Marks
Question
Two supplementary angles are in the ratio 7 : 5. Find the angles.
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Answer
Ratio between two supplementary angles are 7 : 5 ∴ Sum of ratios = 7 + 5 = 12 But sum of two supplementary angles = 180° $\therefore$ First angle $=180^{\circ} \times \frac{7}{12}=15^{\circ} \times 7=105^{\circ}$ and second angle $=\frac{180^{\circ} \times 5}{12}=15^{\circ} \times 5=75^{\circ}$ ∴ Two supplementary angles are 105° and 75°
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