7. Find the fourth proportional to the numbers 42, 18 and 7.
8. The angles of a triangle are in the ratio 3 : 5:2. Find the biggest angle, it being known that
the sum of the three angles of a triangle is 180°
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let the fourth porportional be X and see in figure and of quesyion no8 let the ratio be 3x,5x,2x respectively and don't forget to thank and follow me!!
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