| A | B |
|---|
| face | flat surface of a solid that does not roll |
| edge | line segment where two faces of a solid meet |
| vertex (3-D solid figures) | the point where 3 or more edges of a solid meet |
| plane figure | a figure with only two dimensions |
| polygon | closed plane figure made of line segments |
| point | an exact location in space |
| line | straight path of points that goes on in two directions |
| line segment | a part of a line that has two endpoints |
| ray | a part of a line that has one endpoint that continues on and on in only one direction |
| angle | formed by two rays with a common endpoint |
| vertex (2-D plane figures) | the common endpoint of two rays |
| parallel lines | two lines that never intersect |
| intersecting lines | two lines that pass through the same point |
| perpendicular lines | two lines that intersect and form a right angle |
| trapezoid | quadrilateral with only one pair of parallel sides |
| parallelogram | quadrilateral with opposite sides that are parallel |
| rhombus | quadrilateral with opposite sides that are parallel and all sides are the same length |
| rectangle | quadrilateral with two pairs of parallel sides and four right angles |
| square | quadrilateral with 2 pairs of parallel sides and four right angle and all sides are the same length |
| circle | a closed plane figure made with all of the points the same distance from a point called the center |
| diameter | any line segment that connects two points on the circle and passes through the center |
| radius | any line segment that connects the center to a point on the circle |
| chord | any line segment that connects two points on the circle |
| perimeter | the distance around a figure |
| symmetric | a figure that can be folded into two congruent halves that fit on top of each other |
| line of symmetry | a line on which a figure can be folded so that both halves are congruent |
| area | the number of square units needed to cover the region inside a figure |
| volume | the number of cubic units needed to fill a solid figure |
| slide (translation) | p. 452 like a stamped design |
| flip (reflection) | p. 452 like a mirror |
| turn (rotation) | p. 452 pivot around a point |
| congruent | p. 453 |
| similar | p. 458 |
