| Question | Answer |
|---|---|
| What is an adjective describing points which lie on the same line? | Colinear |
| What is an adjective describing points which lie on the same plane? | Coplanar |
| Lines intersect in a _____. | Point |
| Planes intersect in a _____. | Plane |
| A polygon is _____ if all of its sides are congruent. | Equilateral |
| A polygon is _____ if all of its interior angles are congruent. | Equiangular |
| A polygon is _____ if it is both equilateral and equiangular. | Regular |
| An unproven statement that is based on a pattern or observation. | Conjecture |
| Process of looking for patterns and making conjectures. | Inductive Reasoning |
| An example that shows a conjecture is false. | Counterexample |
| Has no dimension. It is represented by a small dot. | Point |
| Has one dimension. It extends without end in 2 directions. | Line |
| Has 2 dimensions. It is represented by a shape that looks like a floor or wall. | Plane |
| Statements that are accepted without further justification. | Postulates |
| Points that lie on the same line. | Collinear Points |
| Points that lie on the same plane. | Coplanar Points |
| Lines that lie on the same plane. | Coplanar Lines |
| Part of a line that consists of 2 points, called end points, and all points on the line that are between the endpoints. | Segment |
| Have the same length. | Congruent Segments |
| Endpoint of the angle. | Vertex |
| Measure is between 0° to 90° | Acute Angle |
| Measure is 90° | Right Angle |
| Measure is between 90° to 180° | Obtuse Angle |
| Measure is 180° | Straight Angle |
| Any particular extent of space or surface | Area |
| A straight line extending from the center of a circle or sphere to the circumference or surface | Radius |
| A straight line passing through the center of a circle or sphere and meeting the circumference or surface at each end. | Diameter |
| The outer boundary, especially of a circular area | Circumference |
| A plane figure bounded by two radiuses and the included arc of a circle | Sector |
| Relation in degree or number between two similar things. | Ratio |
| An equation stating that two ratios are equivalent. | Proportion |
| Two polygons whose corresponding angles are congruent and the lengths of the corresponding sides are proportional. | Similar Polygons |
| A segment, ray, line, or plane that intersects a segment at its midpoint | Segment Bisector |
| A ray that divides an angle into 2 angles that are congruent | Angle Bisector |
| Two angles whose degrees total 180 degrees | Supplementary |
| a true statement that follows from other true statements | Theorem |
| 2 adjacent angles that have noncommon sides on the same line | Linear Pair |
| Uses facts, definitions, accepted properties, and the laws of logic to make a logical argument | Deductive Reasoning |
| A three dimensional shape | Solid |
| A congruent polygon usually found at the top or bottom of a shape | Base |
| The surfaces on planes | Face |
| The sum of polyhedron's surfaces | Surface Area |
| Ratio of lengths of 2 corresponding sides of thw similar polygons | Scale Factor |
| Segment that connects the midpoints of two sides of a triangle | Midpoint of a Triangle |
| Transformation with center C and scale factor K that maps each point P to an image P' so that p" lies on ray CP and CP' = K(CP) | Dilation |
| Amount of surface covered by a figure | Area |
| Distance from the center to a point on the circle | Radius |
| Distance across the circle through the center | Diameter |
| Distance around the circle | Circumference |
| Region of a circle determined by 2 radii and a part of the circle | Sector |
| no line that contains a side of the polygon passes through interior (a shape that doesn't curve in etc). | Convex |
| a polygon that isn't convex (a shape that does curve in). | Concave |
| all sides are congruent | Equilateral |
| all angles are congruent | Equiangular |
| if a polygon is equi/angular/lateral | Regular |
| the three original triangles angles on the inside. | Interior Angles |
| the three extended angles on the outside that are also adjacent to the interior. | Exterior Angles |
| a parallelogram with four congruent sides and angles | Square |
| a parallelogram with four right angles | Rectangle |
| the perpendicular segment from a vertex to the line containing the opposite side | Height of a Triangle |
| When a point is the same distance from one line as it is from another line | Equidistant |
| A segment, ray, or line that is perpendicular to a segment at its midpoint | Perpendicular Bisector |
| a transformation that creates a mirror image | Reflection |
| a line of reflection | Line of Symmetry |
| A quadrilateral with exactly one pain of parallel sides called bases. The nonparallel sides are the legs | Trapezoid |
| a trapezoid with congruent legs | Isosceles Trapezoid |
| A segment that connects the midpoints of two sides of a triangle. | Midsegment of a Trapezoid |
| A triangle with three acute angles | Acute Triangle |
| Two angles at the base of an isosceles triangle | Base angles of an Isosceles Triangle |
| The point at which the three medians of a triangle intersect | Centroid |
| Gives the distance between two points in a coordinate plane. | Distance Formula |
| Angles that are adjacent to the interior angles | Exterior Angles |
| The side opposite the right angle in a right triangle | Hypotenuse |
| The congruent sides of an isosceles triangle. | Legs of Isosceles Triangle |
| A segment from a vertex to the midpoint of the opposite side | Triangle Median |
| A triangle with one obtuse angle | Obtuse Triangle |
| The square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the legs in a right triangle | Pythagorean Theorem |
| A triangle with one right angle | Right Triangle |
| A triangle with no congruent sides | Scalene Triangle |
| segment whose endpoints are points on a circle | Chord |
| line that intersects a circle in two points | Secant |
| a line in the plane of a dircle that intersects the circle in exactly one point (point of tangency) | Tangent |
| an arc whose endpoints form an angle less than 180 degrees with the center of the circle | Minor Arc |
| an arc of a circle that is longer than a semicircle | Major Arc |
| the measure of an arc | Arc Length |
| an angle placed inside a circle with its vertex on the circle and whose sides contain chords of the circle | Inscribed Angle |
| an arc of the circle in the interior of an angle | Intercepted Angle |
| the action of rotating around an axis or center (fixed point) | Rotation |
| symmetry when obtained by a rotation | Rotational Symmetry |
| sum of the areas of the lateral faces | Lateral Area |
| perpendicular distance between the vertex and the base, height of any of the lateral faces. | Slant Height |
| the number of cubic units contained in the object's interior | Volume |
| a half of a sphere | Hemiphere |
| a point on the segment that divides it into two congruent sides | Midpoint |
| a line that divides the segment into two congruent segments | Bisector |
| two angles that add up to 90 degrees | Complimentary Angles |
| two angles that shares a common vertex and same side. There are no common interior points | Adjacent |
| non-adjacent angles formed by two intersecting lines. They are diagnal to each other | Vertical Angles |
| the “if” contains the hypothesis and the “then” contains the conclusion | If-Then Statement |
| A polygon is _____ if no line that contains a side of the polygon passes through the interior of the polygon. | Convex |