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Unit 4 Words
Math
| Term | Definition |
|---|---|
| Adjacent Angle | two angles that have a common side and a common vertex (corner point), and don't overlap |
| Area | The size of a surface; The amount of space inside the boundary of a flat (2-dimensional) object such as a triangle or circle |
| Circumference | The distance around the edge of a circle (or any curvy shape). It is a type of perimeter |
| Complementary Angle | two Angles that add up to 90 degrees (a Right Angle). They don't have to be next to each other, just so long as the total is 90 degrees |
| Composite area | is found by adding together the areas of the individual figures |
| Cross section | this is of a solid is a plane figure obtained by the intersection of that solid with a plane. This represents a "slice" of a solid, and may be different depending on the orientation or direction of the slicing plane |
| Diameter | A straight line going through the center of a circle connecting two points on the circumference |
| Formula for area of circle | A= πr2 |
| Formula for circumference of circle | c = 2πr or c = πd |
| Net | A pattern that you can cut and fold to make a model of a solid shape |
| Pi | The ratio of a circle's circumference to its diameter; Equal to 3.14159265358979323846... (the digits go on forever without repeating); A rough approximation is 22/7 (=3.1428571...), but that is not very accurate |
| Plane | a flat, two-dimensional surface that extends infinitely far in all directions |
| Radius | The distance from the center to the circumference of a circle it is half of the circle's diameter |
| Supplementary Angle | two Angles that add up to 180 degrees. They don't have to be next to each other, just so long as the total is 180 degrees |
| Surface area | The total area of the surface of a three-dimensional object. |
| Three- dimensional | An object with three dimensions (such as height, width and depth) like any object in the real world |
| Two-dimensional | A shape with only two dimensions (such as width and height) and no thickness. Squares, Circles, Triangles, etc are two dimensional objects |
| Vertical Angle | the angles opposite each other when two lines cross. They are always congruent (equal) |
| Volume | The amount of 3-dimensional space an object occupies. capacity |
Created by:
cmnoel686
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