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प्रश्न
Classify the following curve as open or closed:

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उत्तर
Open curve: A curve in which the beginning and end point is different or do not cut each other.
Closed curve: A curve in which the beginning and end point is the same and cut each other.
By the above definitions, we can classify the given figure as follow:
Closed curve
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संबंधित प्रश्न
Examine the table. (Each figure is divided into triangles and the sum of the angles deduced from that.)
| Figure | ![]() |
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| Side | 3 | 4 | 5 | 6 |
| Angle sum | 180° |
2 × 180° = (4 − 2) × 180° |
3 × 180° = (5 − 2) × 180° |
4 × 180° = (6 − 2) × 180° |
What can you say about the angle sum of a convex polygon with number of sides?
a) 7
b) 8
c) 10
d) n
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State the name of a regular polygon of 3 sides.
Find the number of side of a regular polygon, when of its angle has a measure of 150° .
is a concave pentagon.
Find the measure of an are exterior angle of a regular pentagon and an exterior angle of a regular decagon. What is the ratio between these two angles?




