Answer:
لا بد من البحث عن الاجابة لو سمحتم
8-the formula to find an exterior angle of a polygon is:
360/n
(n is the number of sides of the polygon)
so the answer is 40

9 - the formula to find an interior angle of polygon is:

so the answer is 135

good luck
No it isn't. You can determine if a point is by putting the coordinate values in for x and y.
(2)+2(1)=5
2+2=5
4≠5
Assuming you are asking for the volume by your given data points, if so, the volume of the rectangular prism is 840m^3.