Geometry Crossword puzzle

what is the name for an angle that is less than 90 degrees?
what is the word for the space inside a shape?
what are two segments that have the same length called?
what is the space from one point to another called?
what is a statement that is believed to be true?
what is 3.14 called?
what is a multi-sided shape called?
what is a four-sided-shape called?
what is a statement that tries to explain what happened called?
what is a statement that has been proven called?
what is a particular place on a line called?
what is a copy of a preimage called?
what are a pair of adjacent angles called?
what is an end to a statement called?
what is a area that is not limited called?
what is a word that defines another word?
what is a thin surface that does not end?
what is an angle that is more than 90 degrees called?
what are two angles that equal 90 degrees called?
what are two angles that equal 180 degrees called?
what are points that lie on the same line called?
what are two points that lie in the same plane called?