Find the number of triangles which can be formed by joining the angular points of a polygon of 8 sides as vertices.
- 56
- 8
- 24
- None of these
Explanation
A polygon with 8 sides has 8 vertices. To form a triangle, you need to choose 3 vertices out of these 8. This can be done in:
8C3 = 8! / (3! x (8-3)!)
= 8! / (3! x 5!)
= (8 x 7 x 6) / (3 x 2 x 1)
= 56
So, 56 triangles can be formed by joining the angular points of a polygon with 8 sides.
Related MCQs
مستطیل کے دائرہ کار کا فارمولا کیا ہے؟
- 2 (length + width)
- 2 (length × width)
- Length + width
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 55.8 m
- 58.8 m
- 60.5 m
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 21.6 m
- 20.0 m
- 20.6 m
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 81.9
- 163.8
- 153.8
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 5
- 6
- 8
- 9
اس سوال کو وضاحت کے ساتھ پڑھیں
