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Why is it impossible for a triangle to contain a 180 angle?
It is impossible to have a 180 degree angle because all three of a triangle's angles have to equal 180. If you have one angle of 180, then you would have 2 angles of 0, making a plain old straight line.
A plain figure with six sides?
I guess it is a dice or what else is it supposed to be? A hexagon is a plane figure with 6 sides.
How many edges does a polygon have?
A polygon has NO edges. However, it has 'any number' of sides. The word 'poly' is from Latin, and means 'many'. The word 'gon' is a plain 2-dimension figure.
What is the difference between a plane figure and a solid figure in geometry?
Oh, dude, it's like this - a plane figure is flat like a pancake, just two dimensions, while a solid figure is like a 3D movie, it's got depth and volume. So, if you're into flat stuff, go for plane figures, but if you like things with a little extra oomph, solid figures are where it's at.
What is the base of a 7 sided pyramid called?
The base being a plain figure will be an HEPTAGON. However, with the seven triangular faces ( to the point), plus the base, there are eight faces. So as a solid object it will be an irregular octahedron.
