Question | Answer |
Line | A straight path of points that goes on forever in two directions. |
Ray | Part of a line that has one end point and extends forever in one direction. |
Parallel Lines | In a plane, lines that never cross and stay the same distance apart. |
Intersecting Lines | Lines that pass through the same point. |
Perpendicular Lines | Two lines that intersect form square corners or right angles. |
Point | An exact location in space. |
Line segment | Part of a line having two end points. |
Plane | An endless flat surface. |
Angle | Two rays that have the same endpoint. |
Acute Angle | An angle whose measures is between 0˚ and 90˚ degrease. |
Right Angle | An angle whose measure is 90˚. |
Obtuse Angle | An angle whose measure is between 90˚ and 180˚. |
Straight Angle | An angle measuring 180˚. |
Vertex | The common endpoint of the two rays in an angle. |
Protractor | An instrument that is the result of multiplying two or more factors. |
Degrees | A unit of measure for angles and temperature. |
Polygon | A closed plane figure made up of line segments. |
Regular Polygon | A polygon that has sides of equal length and angles of equal measures. |
Triangle | A polygon with 3 sides. |
Quadrilateral | A polygon with 4 sides. |
Pentagon | A polygon with 5 sides. |
Hexagon | A polygon with 6 sides. |
Octagon | A polygon with 8 sides. |
Equilateral Triangle | A triangle whose sides all have the same length. |
Isosceles Triangle | A triangle with two sides are the same length. |
Scalene Triangle | A triangle which no sides are the same length. |
Right Triangle | A triangle which on angle is a right angle. |
Acute Triangle | A triangle whose angles are acute angles. |