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3rd 6 Weeks test rev
1st semester Geometry Review
| Term | Definition |
|---|---|
| altitude | A segment in a triangle that goes from a vertex perpendicular to the opposite side of the triangle. |
| perpendicular bisector | A segment that is both perpendicular and bisects a segment. |
| median | A segment in a triangle that goes from a vertex to the midpoint of the opposite side. |
| Perpendicular lines | Lines that form right angles. |
| midpoint | A point that divides a segment into two congruent segments. |
| Segment bisector | A line, line segment, point or ray that divides a segment into two congruent segments. |
| angle bisector | A line, line segment, or ray that divides and angle into two congruent angles. |
| pentagon | A polygon with five sides. |
| Reflexive property | AB ≅ AB |
| Regular polygon | A polygon with all sides congruent and all angles congruent. |
| proof | The process of establishing validity. |
| scalene triangle | A triangle where no sides are congruent. |
| Isosceles triangle | A triangle with exactly two sides congruent. |
| equilateral triangle | A triangle with three congruent sides. |
| equiangular triangle | A triangle with three congruent angles. |
| hypothesis | The “if” part of a conditional statement |
| Conclusion | The “then” part of a conditional statement. |
| octagon | A polygon with eight sides. |
| decagon | A polygon with ten sides. |
| Collinear | Points on the same line. |
| Coplanar | Points on the same plane. |