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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. |