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# how do I work this out ? watch

1. how can I work a polygon question out if it doesn't
name the polygon ?

2. (Original post by Wildnatxox)
how can I work a polygon question out if it doesn't
name the polygon ?

Use the triangles to work out the exterior angle. Divide 360 by this, and that's the number of sides the polygon has.
3. you can find the angle in the 3 sided shapes easily enough... then think how to make up 360 degrees using the bigger shapes as well.
4. (Original post by dominikaba)

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half the triangle, so that the line of symmetry is in line with shape A. The exterior angle becomes 30. 360/30 = 12 sides.
5. (Original post by Mehru1214)

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half the triangle, so that the line of symmetry is in line with shape A. The exterior angle becomes 30. 360/30 = 12 sides.
If you half the triangle then 30 will be the amount of each interior angle
6. (Original post by Wildnatxox)
If you half the triangle then 30 will be the amount of each interior angle
30 would be the exterior angle, 150 would be the interior.

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