Practice set 4.2
1. Construct A POR, in which QR = 4.2 cm, mZQ = 40° and PQ+ PR = 85 cm
2 Construct A XYZ, in which YZ = 6 cm. XY+XZ = 9 cm. ZXYZ = 50°
3. Construct A ABC, in which BC = 6.2 cm, ZACB = 50°. AB + AC = 9.8 cm
4. Construct A ABC, in which BC = 3.2 cm, ZACB = 45° and perimeter of A ABC
is 10 cm
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The presence of different amounts of various gases in air doesn't mean that air would be heterogeneous mixture.
Always, mixture of two or more gases is homogenous mixture, irrespective of the amounts of various gases present in the mixture.
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