geometry

2. A two-dimensional shape in which all points on the curved line are equidistant from a center point.
8. Two lines in a two-dimensional space that do not meet (for example, the opposite sides of a square). A parallelogram has two sets of parallel lines.
9. terms: Words and phrases that describe the location of an object in relation to other objects, including words like on, under, on top of, next to, in front of, behind, beneath, underneath, inside, outside, at/on the bottom/top, between, and adjacent to (this is just a sample, there are many more).
11. Two lines that meet to make a corner.
12. A closed four-sided figure with parallel opposite sides. A square is a special kind of rhombus. Sometimes called a diamond.
13. The meeting of two faces on a three-dimensional shape.
14. A two-dimensional, closed, four-sided figure with four right angles.
15. Surface planes of three-dimensional shapes.
18. Identical in size and shape.
19. Line segments in geometric figures that compose the exterior of the object.
20. Without a curve.

1. Terminology to describe the dimensions of an object or set. With young children, the terms large, medium, small, taller, shorter, longer, less than and greater than are all appropriate.
3. Also known as corner/corners. The point at which two sides of a two-dimensional figure or two edges of a three-dimensional figure meet.
4. Having curvy or undulating attributes (e.g., ocean, octopus tentacles).
5. A closed figure with three sides.
6. Having a plane-like quality.
7. Sides that are the same length.
10. A flat two-dimensional surface upon which two-dimensional objects (e.g., circle, square) can lie, or the face of a three-dimensional object as it creates a surface (e.g., face of a cube); the dimensions of which are infinite.
16. A specific position on a line, plane, or in space.
17. An informal word to describe angles of objects.