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Module 5 Vocabulary
Area, Surface Area and Volume
| Term | Definition |
|---|---|
| base of a triangle | One of the sides of the triangle |
| height of a triangle | the perpendicular line segment from the base of the triangle to the opposite vertex |
| net | the net of a solid is formed when the surface of the solid is cut along enough edges so that the faces of the solid can be placed in one plane to form a connected, two-dimensional figure. |
| parallel planes | Two planes in space are parallel planes if they do not intersect. |
| surface area | The total area of the faces of a solid |
| triangular region | The union of a triangle and its interior |
| acute angle | an angle less than 90 degrees |
| acute triangle | a triangle with all angles measuring less than 90 degrees |
| area | the amount of space inside a two dimensional figure, measured in square units |
| base | the side or face where the figure is considered to stand or rest. |
| cube | a three-dimensional solid with six square faces |
| edge | a line where two surfaces meet |
| face | front or surface |
| height | the vertical distance from the bottom to the top. |
| isosceles triangle | a triangle with two equal sides and two equal angles |
| obtuse angle | an angle greater than 90 degrees |
| obtuse triangle | one interior angle is greater than 90 degrees |
| parallel | two lines the same distance apart that never intersect |
| perimeter | the total distance around the outside, found by adding up the lengths of all sides. |
| perpendicular | two lines that intersect to create a right angle. |
| vertex | a point where two or more lines meet forming a corner or point of intersection. |
| pyramid | a three-dimensional shape with a polygonal base and triangular sides that meet at a single point. |
| prism | a three-dimensional shape with two identical, parallel polygonal bases, and flat, parallelogram-shaped sides connecting them |
| volume | the amount of space a three-dimensional object occupies |