Question

The four angles $\angle A.\angle B,\angle Cand\angle D$ of a quadrilateral are in the ratio 3:5:7:9 respectively. Then $\angle C$ equals

• A. ${105}^{}$
• B. ${75}^{}$
• C. ${45}^{}$
• D. ${135}^{}$

Answer 1

Answer: (A)

${105}^{}$

$3x+5x+7x+9x={360}^{}orx={15}^{}\therefore \angle C=7x=7\times 15={105}^{}$