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| 1. |
2Find the angles of the parallelogram ABCD if (i) angle A: angle B = 2:7 (ii) angle C =3 |
| Answer» IO of angle A:angle of B=2:7Let RATIO be 2x and 7xA+B=180° (adjacent ANGLES of parallelogram are SUPPLEMENTARY)2x+7x=180°9x=180°x=180°/2x=20°Angles of parallelogram ABCD are listed below:-A=2x=2×20°=40°B=7x=7×20°=140°C=A=40° (opposite sides of parallelogram are equal)D=B=140° (opposite sides of parallelogram are equal) | |