| A | B |
|---|
| similar polygons | polygons that have the same shape |
| congruent polygons | polygons that have the same size, same shape - exact fit |
| pentomino | a figure made of five congruent squares joined edge to edge |
| line of symmetry | a line on which a figure can be folded so that the two parts fit exactly |
| tessellation | a repeating shape that completely covers an area |
| perimeter | distance around a figure |
| area | measure of the surface of a region in square units - formula for area of a rectangle A = l x w |
| regular polygon | a polygon with equal sides and equal angles |
| formula to find perimeter for a rectangle | P = 2 x (l + w) |
| circle | a plane figure in which all the points are the same distance from the center |
| circumference | the distance around a circle |
| diameter | a line segment that goes from one point on a circle through the center to another point on the circle |
| radius | a line segment from the center of a circle to any point on the circle |
| chord | a line segment with both end points on a circle |
