Congruent triangles test
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| 554252803 | triangle | 3-sided polygon | 0 | |
| 554252804 | scalene triangle | no congruent sides | 1 | |
| 554252805 | isosceles triangle | at least 2 congruent sides | 2 | |
| 554252806 | equilateral triangle | 3 congruent sides | 3 | |
| 554252807 | acute triangle | 3 acute angles | 4 | |
| 554252808 | right triangle | 1 right angle | 5 | |
| 554252809 | obtuse triangle | 1 obtuse angle | 6 | |
| 554252810 | equiangular triangle | 3 congruent angles | 7 | |
| 554252811 | interior angles | when the triangle is extended, the _________ angles are the original angles that are in the interior of the triangle | 8 | |
| 554252812 | exterior angles | when the triangle is extended, the __________ angles are the angles that form linear pairs with the ___________ angles | 9 | |
| 554252813 | triangle sum theorem | the sum of the measures of the interior angles of a triangle is 180 degrees | 10 | |
| 554252814 | exterior angle theorem | the measure of an exterior angle of a triangle is equal to the sum of the measures of the 2 nonadjacent interior angles | 11 | |
| 554252815 | corollary to a theorem | a statement that can be proved easily using the theorem | 12 | |
| 554252816 | corollary to the triangle sum theorem | the acute angles of a right triangle are complementary | 13 | |
| 554252817 | congruent figures | all the parts of one figure are congruent to the corresponding parts of the other figure | 14 | |
| 554252818 | third angles theorem | if 2 angles of 1 triangle are congruent to 2 angles of another triangle, then the third angles are also congruent | 15 | |
| 554252819 | side-side-side (SSS) congruence postulate | if 3 sides of 1 triangle are congruent to 3 sides of a second triangles, then the 2 triangles are congruent | 16 | |
| 554252820 | side-angle-side (SAS) congruence postulate | if 2 sides and the included angle of 1 triangle are congruent to 2 sides and the included angle of a second triangle, then the 2 triangles are congruent | 17 | |
| 554252821 | legs of a right triangle | the sides adjacent to the right angle in a right triangle | 18 | |
| 554252822 | hypotenuse | the side opposite the right angle in a right triangle | 19 | |
| 554252823 | hypotenuse-leg (HL) congruence theorem | if the hypotenuse and a leg of a right triangle are congruent to the hypotenuse and a leg of a second right triangle, then the 2 triangles are congruent | 20 | |
| 554252824 | flow proof | a proof that uses arrows to show the flow of a logical argument | 21 | |
| 554252825 | angle-side-angle (ASA) congruence postulate | if 2 angles and the included side of 1 triangle are congruent to 2 angles and the included side of a second triangle, then the 2 triangles are congruent | 22 | |
| 554252826 | angle-angle-side (AAS) congruence postulate | if 2 angles and a non-included side of one triangle are congruent to 2 angles and the corresponding non-included side of a second triangle, then the 2 triangles are congruent | 23 | |
| 554252827 | legs | the 2 congruent sides in an isosceles triangle | 24 | |
| 554252828 | vertex angle | the angle formed by the legs of an isosceles triangle | 25 | |
| 554252829 | base | the third side of an isosceles triangle | 26 | |
| 554252830 | base angles | the 2 angles adjacent to the base | 27 | |
| 554252831 | base angles theorem | if 2 sides of a triangle are congruent, then the angles opposite them are congruent | 28 | |
| 554252832 | converse of base angles theorem | if two angles of a triangle are congruent, then the sides opposite them are congruent | 29 | |
| 554252833 | corollary to the base angles theorem | if a triangle is equilateral, then it is equiangular | 30 | |
| 554252834 | corollary to the converse of base angles theorem | if a triangle is equiangular, then it is equilateral | 31 | |
| 554252835 | transformation | an operation that moves or changes a geometric figure in some way to produce a new figure | 32 | |
| 554252836 | image | the figure that is created after a figure is transformed | 33 | |
| 554252837 | translation | an operation that moves every point of a figure the same distance in the same direction | 34 | |
| 554252838 | reflection | an operation that uses a line of ________ to create a mirror image of the original figure | 35 | |
| 554252839 | rotation | an operation that turns a figure about a fixed point, called the center of rotation | 36 | |
| 554252840 | congruence transformation | an operation that changes the position of a figure without changing its size or shape | 37 |
