Term
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Definition
| If 3 sides of 1 triangle are congruent to 3 sides of another then the triangles are congruent |
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Term
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Definition
| If 2 sides and the included angle of one triangle are congruent to two sides and the included (inbetween sides) angle of another triangle then the triangles are congruent |
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Term
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Definition
| If 2 angles and the included side(in between angles) are congruent to two angles and the included side of another triangle then the triangles are congruent |
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Term
| def of a line perpendicular to a plane |
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Definition
| a line and a plane are perpendicular if and only if they insersect and the line is perpendicular to all lines in the plane that pass through the pont of intersection |
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Term
| Way to prove 2 segments or 2 angles are congruent |
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Definition
1. Identify two triangles in which the 2 segments or angles are corresponding parts
2. Prove that the triangles are congruent
3. State that the 2 parts are congruent using the reason corr. parts of cong triangles are cong. |
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Term
| congruent sides in isosceles triangles are called |
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Definition
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Term
| third side in isosceles triangle is called |
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Definition
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Term
| Angles that touch the base are called |
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Definition
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Term
| angle produced by legs is called |
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Definition
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Term
| Isosceles triangle Theorem |
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Definition
| If 2 sides of a triangle are cong., then the angles opposite those sides are cong. |
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Term
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Definition
| An equilateral triangle is also equiangular |
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Term
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Definition
| An equilateral triangle has 3 60degree angles |
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Term
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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
| theorem that proves sides congruent |
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Definition
| f 2 angles of a triangle are cong. then the sides opposite those angles are congruent. |
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Term
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Definition
| An equiangular triangle is also equilateral |
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Term
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Definition
| If 2 angles and a non-included side of one triangle are cong. to the corresp. parts of another triangle, then the triangles are congruent. |
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Term
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Definition
| f the hypotenuse and the leg of one right triangle are cong. to the corresp. parts of another triangle, then the triangles are cong. |
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Term
| Ways to prove 2 triangles cong. (5) |
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Definition
All triangles: SSS, SAS. ASA, AAS
Right Triangles: HL |
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Term
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Definition
| If a point 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 a 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 the 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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Term
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Definition
| Acute angles of a rt tri are comp. |
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Term
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Definition
| If 2 angles are comp of the same of the same angle, then the 2 angles are cong. |
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