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crescent A crescent is the shape of the moon around the time of the new moon. |
cone A cone is a shape that has a point at one end and a circular opening at the other end. | circle A circle is round. |
| cylinder A cylinder is a figure with a long round body. |
curve A curve is a wavy line or surface. | cube A cube is a solid geometric figure with six square faces. |
| ellipse An ellipse is a flattened circle. | dodecahedron A dodecahedron is a twelve-sided regular geometric solid composed of pentagons. | diamond A diamond is a four-sided figure whose sides are all the same length. People play baseball on a diamond-shaped field. |
| heart The heart is a shape that often symbolizes love. |
fractal Fractals are patterns within patterns within patterns. |
equilateral triangle The sides of an equilateral triangle are all the same length. |
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hexagon A hexagon is a six-sided figure. Bee hives have hexagonal cells. |
hexaflexagon A hexaflexagon is a folded geometric figure that can be "flexed" to expose its many sides. |
heptagon A heptagon is a seven-sided figure. |
| kite A kite is a four-sided figure in which the two pairs of adjacent sides have the same length. |
isosceles triangle An isosceles triangle has two sides that are the same length and two angles that are the same. | icosahedron An icosahedron is a twenty-sided regular geometric solid. |
| octagon An octagon is an eight-sided figure. Stop signs are octagons. | Möbius strip A Möbius strip is a piece of paper with only one side! |
line segment A line segment is a portion of a line. |
| oval An oval is an egg-shaped figure. |
orb A ball-shaped object is an orb. |
octahedron An octahedron is an eight-sided regular geometric solid. |
| . A point is a very small dot. | pentagon A pentagon is a five-sided figure. | parallelogram A parallelogram is a four-sided figure whose opposite sides are parallel. |
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polyhedron Polyhedra are solids made from polygons. | polygon A polygon is a many-sided figure with straight edges. |
polka dots Polka dots are patterns of dots. |
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rectangle A rectangle is a four-sided figure whose sides are at right angles to each other. |
quadrilateral A quadrilateral is a four-sided figure. The square, rectangle, rhombus, trapezoid, kite, and parallelogram are quadrilaterals. | pyramid The pyramids in Egypt are huge buildings that have a square base and triangular sides. |
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round Round things are curved. A circle is round. |
right triangle A right triangle has one angle that is a right angle (extending 90 degrees). |
rhombus A rhombus is a parallelogram with equal-length sides. |
| shapes Everything has a shape. |
semicircle A semicircle is half a circle. | scalene triangle The sides of a scalene triangle are all different lengths. |
| square A square has four, equally long sides which are at right angles to each other. | spiral A spiral is a curve that winds in on itself. Snail shells have a spiral pattern. | sphere A sphere is a ball-shaped object. |
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torus A torus is a doughnut-shaped object. |
tetrahedron A tetrahedron is a pyramid formed by four triangles. |
star A star is a shape that has many points. |
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zigzag A zigzag is a line that sharply turns back and forth. |
triangle A triangle has three sides. |
trapezoid A trapezoid is a four-sided figure with two parallel sides. |
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