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| An angle with a measure less than 90 |
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| The segment perpindicular to a base of a triangle from the opposite vertex. |
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| Formed from two rays with the same endpoints called the vertex |
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| The ray that divides an angle into two congruent, adjacent angles |
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| The set of points on a plane that are a given distance froma given point |
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| Two angles whose measures add up to 90 |
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| Figures that have the same size and shape |
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| using reasoning from accepted postulates, thereoms, definitions, and givin info to prove something |
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Term
| A polygon whose vertices all lie on a circle |
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| A triangle with at least two sides congruent |
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| A segment from a vertex to the midpoint of the opposite side. |
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| An angle whose measure is greater than 90 and less than 180 |
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| Coplaner lines that never intersect |
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Term
| A line that intersects a segment at its midpoint and makes a right angle |
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| Formed by coplaner sides so that each segment intersects exactly 2 segments,, no two segments are collinear |
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| A statement that is accepted without proof. |
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| A polygon that is both equilateral and equangular |
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| An angle with a measure exactly 90 |
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| A region bound by two radii and an arc of the circle |
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| Two angles that add up to 180 |
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| A statement that can be proved |
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Term
| Two angles whose sides form two opposite rays |
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