Term
| SSS postulate (postulate 12) |
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Definition
| If three sides of a triangle are congruent to three sides of another triangle the triangles are congruent. |
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Term
| SAS postulate (postulate 13) |
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Definition
| If two sides and the included angle of one triangle are congruent to two side and the included angle of another triangle, the triangles are congruent. |
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Term
| ASA postulate (postulate 14) |
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Definition
| If two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, the triangles are congruent. |
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Term
| Isosceles Triangle Theorem |
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Definition
| If two sides of a triangle are congruent, then the angles opposite those sides are congruent. |
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Term
| Corollary 1 (In chapter 4 |
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Definition
| An equilateral triangle is also equiangular or an equiangular triangle is also equilateral. |
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Term
| Corollary 2 (In chapter 4) |
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Definition
| An equilateral triangle has three 60 degrees angles. |
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Term
| Corollary 3 (In chapter 4) | | |
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Definition
| The bisector of the vertex angle of an isosceles triangle is perpendicular to the base at its midpoint. |
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Term
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Definition
| If two angles of a triangle are congruent, then the sides opposite those angles are also congruent |
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Term
| AAS theorem? (Theorem 4-3) | | |
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Definition
| If two angles and a non-included side of one triangle are congruent to the corresponding parts of another triangle, then the triangles are congruent. |
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Term
what is the HL theorem (4-4)
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Definition
| If the hypotenuse and a leg of one right triangle are congruent to the corresponding parts of another right triangle, then the triangles are congruent. |
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Term
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Definition
| If a point lies on the perpendicular bisector of a segment, then the point is equidistant from the endpoints of the segment. |
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Term
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Definition
| If point is equidistant from the endpoints of a segment, then the point lies on the perpendicular bisector of the segment. |
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Term
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Definition
| If a point lies on the bisector of an angle, then the point is equidistant from the sides of an angle. |
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Term
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Definition
| If a point is equidistant from the sides of an angle, then the point lies on the bisector of the angle. |
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