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CBSE Class 9 Answered

ADJACENT ANGLES OF A PARALLELOGRAM R IN RATIO 2:3. FIND ALL 4 ANGLES.
Asked by abhilash_1995 | 12 Oct, 2008, 11:43: PM
answered-by-expert Expert Answer

Let  the adjacent angles be 2x and 3x .

Then 2x + 3x = 180 ( Cointerior angles are supplementary, since opp sides of a //gm are //)

5x = 180 deg

x = 36 deg

2x = 72 deg and 3x = 108 deg.

Opposite angles of a // gm are equal .

So the angles of the //gm are 72,72,108, 108 deg

Answered by | 13 Oct, 2008, 08:24: AM

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