A nonagon is a 2D shape so you cannot make a 3D nonagon!
540 degrees. you figure it out by seeing how many triangles you can make in the polygon (without crossing lines), and, because triangles equal 180 degrees, you multiply 180 times how many triangles you can make.
Yes, Four Triangles make a rectangle.
Yes
There are 6 triangles in an octagon
7
Yes, by intersecting them.
A nonagon is a 2D shape so you cannot make a 3D nonagon!
Two intersecting rays form an angle. Without two rays you do not have an angle.
There are technically many shapes that could be put into the form of a triangle, but only triangles can make real triangles (without getting into more complicated shapes).
we can make a trapezium with 3 equal triangles.
540 degrees. you figure it out by seeing how many triangles you can make in the polygon (without crossing lines), and, because triangles equal 180 degrees, you multiply 180 times how many triangles you can make.
Draw a nine sided polygon.
All of them. If its truly intersecting lines, they have to form right angles. All of them. If its truly intersecting lines, they have to form right angles.
no because it has to be all equal and right angles
No two equilateral triangles do not make a square but two right triangles do.
Yes, Four Triangles make a rectangle.