| A | B |
|---|
| protractor | An instrument for laying down and measuring angles on paper, used in drawing and plotting. |
| surface area | The total area of the surface of a 3-dimensional figure. |
| quadrilateral | A polygon that has four sides. |
| parallelogram | A quadrilateral that contains two pairs of parallel sides. |
| rectangle | A parallelogram with four right angles. |
| rhombus | A parallelogram with four congruent sides. |
| square | A parallelogram with four congruent sides and four right angles. |
| trapezoid | A quadrilateral with exactly one pair of parallel sides. |
| perimeter | The distance around a closed figure. |
| area | The amount of surface enclosed in a closed figure. |
| volume | The amount of space that a 3-dimensional figure encloses, measured in cubic units. |
| cubic unit | A unit for measuring volume, such as a cubic inch or a cubic centimeter. |
| congruent figures | Figures that have the same shape and size and the measure of the angles is the same. |
| similar figures | Figures that have the same shape but not necessarily the same size but the measure of the angles is the same. |
| transformation | A change of position of a geometric figure. |
| translation | A transformation that moves a figure along a straight line without turning or flipping it. |
| reflection | A transformation that creates a mirror image of a figure across a straight line. |
| rotation | A transformation that turns a figure around a point. |
| glide reflection | A transformation that is a combination of a reflection and a translation. |
| symmetric about a line | A figure that can be folded along a line so that the two halves match exactly or are congruent. |
| line of symmetry | A line that divides a figure into two parts that match when the figure is folded on that line. |
| compound figure | A shape that is made up of two or more shapes. |
| polygon | A closed plane figure formed by three or more line segments. |
