Terms : Hide Images
| 5493406854 | Tangent | intersects a circle in only 1 place. |  | 0 |
| 5493406855 | Secant | intersects a circle in 2 places. |  | 1 |
| 5493406860 | Central angle | is equal to its intercepted arc. |  | 2 |
| 5493406861 | Inscribed angle | is equal to ½ its intercepted arc. |  | 3 |
| 5493406872 | Adjacent angles | share a common vertex, a common side, but not common interior points. |  | 4 |
| 5493406873 | Complementary angles | 2 angles when added together that equal 90 degrees. They do not have to be adjacent angles. |  | 5 |
| 5493406874 | Supplementary angles | 2 angles when added together that equal 180 degrees.They do not have to be adjacent angles. |  | 6 |
| 5493406875 | Vertical angles | are congruent |  | 7 |
| 5493406876 | Alternate interior angles | are congruent. |  | 8 |
| 5493406877 | Corresponding angles | are congruent. |  | 9 |
| 5493406878 | Sum of the angles in a triangle | the 3 angles of a triangle add up to 180 degrees. |  | 10 |
| 5493406879 | Triangles classified by sides | scalene triangles have no equal sides. isosceles triangles have at least 2 equal sides. equilateral triangles have 3 equal sides. |  | 11 |
| 5493406880 | Triangles classified by angles | acute triangles have 3 acute angles. right triangles have a 90 degree and 2 acute angles. obtuse triangles have an obtuse and 2 acute angles. |  | 12 |
| 5493406881 | Exterior angle of a triangle | equals the sum of the 2 opposite interior angles. |  | 13 |
| 5493406882 | Isosceles triangles | sides opposite congruent angles are congruent. angles opposite congruent sides are congruent. |  | 14 |
| 5493406883 | Triangle inequality theorem | the sum of 2 sides of a triangle must be greater than the 3rd side. | 15 | |
| 5493406885 | Median | bisects the opposite side into 2 congruent line segments. median segments are in a ratio of 2 to 1. |  | 16 |
| 5493406886 | Angle bisector | bisects an angle into 2 congruent angles. |  | 17 |
| 5493406887 | Altitude | makes a right angle with the opposite side. |  | 18 |
| 5493406888 | Perpendicular bisector | bisects and makes a right angle with a side of a triangle. |  | 19 |
| 5493406889 | Similar triangles | angles in similar (∼) triangles are congruent. sides are in proportion. |  | 20 |
| 5493406890 | Proving triangles similar | need only 2 angles to be congruent to prove 2 triangles similar. |  | 21 |
| 5493406891 | Proving triangles congruent | can not be angle angle side (A.S.S.) or side side angle(S.S.A.). |  | 22 |
| 5493406892 | C.P.C.T.C. | corresponding parts of congruent triangles are congruent. | 23 | |
| 5493406893 | Pythagorean theorem | a squared plus b squared equals c squared. the hypotenuse is always c. |  | 24 |
| 5493406920 | Perimeter | distance around the outside of a polygon. | 25 | |
| 5493406934 | Transformations | Dilations are a capital D. Reflections are a lower case r. Rotations are a capital R. Translations are a capital T. |  | 26 |
| 5493406935 | Dilation | Multiply both coordinates by the scale factor. |  | 27 |
| 5493406936 | Reflection over the x axis | change the sign of the y coordinate. |  | 28 |
| 5493406937 | Reflection over the y axis | change the sign of the x coordinate. |  | 29 |
| 5493406938 | Reflection over the line y=x | switch the x and y coordinates. |  | 30 |
| 5493406939 | Rotation of 90 degrees | graph the coordinate. rotate the graph 90 degrees counter clockwise and read the new point. |  | 31 |
| 5493406940 | Rotation of 180 degrees | graph the coordinate. rotate the graph 180 degrees counter clockwise and read the point. |  | 32 |
| 5493406941 | Rotation of 270 degrees | graph the coordinate. rotate the graph 270 degrees counter clockwise and read the point. |  | 33 |
| 5493406942 | Translation | add the 2 integers to the orginal coordinate. add the first integer to the x coordinate and the second integer to the y coordinate. |  | 34 |
| 5493406952 | Plane | has no thickness and extends forever in all directions. |  | 35 |
| 5493406953 | Line | has no thickness, but it extends forever in both directions. |  | 36 |
| 5493406955 | Collinear points | are points that lie on the same line |  | 37 |
| 5493406956 | Coplanar points | are points that lie on the same plane |  | 38 |
| 5493406957 | Parallel lines | are lines on the same plane that never touch. | 39 |
