Take first angle = X
Second angle is twice as large as first = 2X
Third angle is 20 degrees lesser than first = X-20
We know that sum of all angles of a triangle is 180 degrees .
X+2X+(X-20) = 180
First angle =50degrees
Second angle =2×50=100 degrees
Third angle = 20-X =20-50=-30 = 30 degrees
Ignore negative sign
( If you get Value higher change formula so that negative answer does not come that is make the formula
X-20 ) .
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