Բազմանկյուն, ուռուցիկ բազմանկյուն, քառանկյուն
![](https://koryun.gaboyan.am/wp-content/uploads/2022/09/image.png)
![](https://koryun.gaboyan.am/wp-content/uploads/2022/09/image-1.png)
3 եռանկյուն
![](https://koryun.gaboyan.am/wp-content/uploads/2022/09/image-2.png)
4 եռանկյուն
![](https://koryun.gaboyan.am/wp-content/uploads/2022/09/image-3.png)
(5-2)*180=540
(6-2)*180=720
(10-2)*180=1440
![](https://koryun.gaboyan.am/wp-content/uploads/2022/09/image-4.png)
![](https://koryun.gaboyan.am/wp-content/uploads/2022/09/image-5.png)
(4-2)*180=360
![](https://koryun.gaboyan.am/wp-content/uploads/2022/09/image-6.png)
(5-2)*180=540
540:5=108
![](https://koryun.gaboyan.am/wp-content/uploads/2022/09/image-7.png)
(x-2)*180=540
180x-360=540
180x=540+360
180x=900
900:180=x
X=5
![](https://koryun.gaboyan.am/wp-content/uploads/2022/09/image-8.png)
(4-2)*180=360
360-40=320
320/4=80(1, 2, 3 անկյունները)
80+40=120(4 անկյունը)