Question

two supplementary angles are in ratio 5:4 find the angles​

Answer 1

Let the angles be  and 

Now I can say:



Multiply both sides by 





Add  to both sides





and, also

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Answer 2

LET THE RATIO OF ANGLE BE X

5X+4X=180

LINEAR PAIR

9X=180

×=20

5×20

100°

4×20

80°