Jawapan

2016-05-02T09:32:17+08:00
One angle of a polygon has 100 degrees and the rest are 140 degrees. Find the number of sides of the polygon.
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If you mean the rest are each 140 degs:
Possible sums are:
380
520
660
800
940
1080 -->8 sides
.

.
.
1980 --> 16 sides
.
.
.
2880 --> 24 sides
etc
The sum has to be a multiple of 180. Adding 900 degs gives the results

So, possible number of sides = multiple of 8