| A | B |
|---|
| A flat surface of a solid. | face |
| a line segment where two faces of a solid meet | edge |
| A point where two or more edges meet. | vertex |
| A figure that lies on a flat surface. | plane figure |
| A closed plane figure made of line segments. | polygons |
| A figure with three sides. | triangle |
| A figure with four sides. | Quadrilateral |
| A figure with five sides. | pentagon |
| A figure with six sides. | hexagon |
| A figure with eight sides. | octagon |
| All sides are the same length. | equilateral |
| At least two sides are the same. | Isosceles |
| No sides are the same length. | scalene |
| Two rays with a common vertex. | angle |
| Part of a line having only one endpoint. | ray |
| Having the same size and shape. | congruent |
| To turn a figure over. | flip |
| To rotate a figure. | turn |
| To move a figure in one direction. | slide |
| Having the same shape. | similar |
| A straight path that goes on forever in both directions. | line |
| Part of a line with two end points. | line segement |
| A location in space. | point |
| Lines that never meet. | parallel |
| Two lines that cross at a point. | intersecting |
| Lines that intersect at right angles. | perpendicular |
| A line on which something can be folded so that both halves are congruent. | line of symmetry |
| The formula for area. | A=LxW |
| The formula for perimeter. | P=s+s+s+s |
| The formula for volume. | V=LxWxH |
