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Geometry
For math
Term | Definition |
---|---|
Circumference | C=2pi r or C=pi d |
Pi | ≈3.14 or ≈22/7 |
Triangle | Polygons with three sides, three angles, three vertices |
Equilateral | All sides congruent |
Isoscles | At lest two side congruent |
Scalene | No sides congruent |
Equangular | All angles congruent |
Point | A geometric object that has no dimensions, only a location |
Plane | at surface that extends endlessly in all directions; two dimentional |
Space | the set of all points;three dimentional |
Line | A set of points along a straight path having no endpoints |
Line segment | Pair of a line that has two endpoints |
Ray | Part of a line that only has one endpoint |
Angle | two rays jointed together with a common endpoint; the two rays are called the sides of an angle |
Vertex | The common endpoint for an angle |
Intersecting lines | Lines that have just one point in common |
Supplementary angles | Two angles whose measure adds up to 180 degrees; any two right angles are supplementary |
Complementary angles | Two angles whose measure adds up to 90 degrees |
Transversal | A line that intersects two other lines |
Adjacent angles | Two angles that share a side ( or ray ) and a vetex |
Skew lines | Lines that are not in the same plane and do not intersect |
Equilateral polygon | All sides congruent |
Equiangular Polygon | All angles congruent |
Parallelogram | Quadrilaterral with both pairs of opposite sides parallel |
Corresponding angles | Two lines intersected by a transversal form corresponding pairs of angles; if the lines are parallel the corresponding pairs of angles are congruent |
n- gon | 180(n-2) |
area of a circle | A=pi r² |
square root | ex.square root of 81=9 |
square | ex. 9 squared or 9² 81 |