@PriyankaMitra said: explain qstn 20 sumone pls

explain qstn 20 sumone pls

CAn any temme %ile for dese scores:

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@global87 said:Ahh yes, got it. Don't know why I assumed all to be 90 degrees. Thanks for your help and for the drawing of course.

@CatAspirant742 said:got it... couldn't imagine that figure at first...

@sivaniim said:try it, it definitely is possible. Draw a 90 degree angle. From one of the vertices draw a 30 degree and then drop a perpendicular from the original angle to the new line. It is possible.just drew a crude drawing for you...

@sivaniim said:try it, it definitely is possible. Draw a 90 degree angle. From one of the vertices draw a 30 degree and then drop a perpendicular to the original angle from the new line. It is possible.just drew a crude drawing for you...

Ahh yes, got it. Don't know why I assumed all to be 90 degrees. Thanks for your help and for the drawing of course.

@global87 said:Is that possible? If two opposite sides of any quadrilateral are 90 deg each, the other two have to be 90. Try drawing a quadrilateral on a piece of paper with two 'OPPOSITE ANGLES' as 90 and the other two not 90 ( like (120,60), (150,30)). I don't think its possible.

@sivaniim said:you did not get my point. Sum of the opposite angles of a cyclic quadrilateral is 180. So, if one angle is 90 degree, the angle opposite it is 90 degree. But it does not say anything about the other two angles, all we know is that their sum is 180. It can be (120,60),(150,30) or any other pair, never it has been mentioned they are equal.

@global87 said:Exactly my point! When any angle of a cyclic quadrilateral is 90 degrees, all become 90 right? Since opp sides of a cyclic quadrilateral add up to 180 degrees. And adjacent sides are given equal, not opposite sides, which makes it a square. If opposite sides were equal, it would have been a Rectangle or a square.