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Why dont triangles and quadrailateral polygons end in 'gon'?
The words are Latin based, and the words tell us a lot about what the figures are. Triangles literally means "three angles" and there are indeed three angles in a triangle. A quadralateral means "four equal sides" and polygon means "many sides figure". So the many sided figure that has four equal sides might be a parallelogram, it might be a square, or a rectangle. The polygon merely says it's a shape. Get the picture? These are actually word pictures.
Why is it an isosceles triangle?
When a triangle has 2 sides that are equal in length it is isosceles from Latin and Greek words. Isosceles may also be a mathematical geometric shape with at least 2 sides having the same length.
Why is a trapezoid a quadrilateral but not a parallelogram?
Because a quadrilateral is any four-sided shape, whereas a parallelogram must have opposite sides and equal angels. A trapezoid only has two sides and equal angles.In other words, a parallelogram has 2 pairs of parallel sides but a trapezoid only has one pair (top and bottom).
How do you specify shapes?
You specify shapes by the number of sides (or edges, different name) they have. The suffix -gon at the end of a word show how many sides it has in the words. For example, an octagon has eight sides; so if you see a shape with eight sides, it's an octogon. All shapes are known as polygons, which means it has three or more sides.
How do you write 23 in words?
Expressed in words, this is equal to two point three.
