# Glossary of Geometric Terms starting with Q-R

A Glossary of Geometric terms can eliminate frustrations of a K-6 math student.  When there is just that one geometry term they don't recognize, or fully understand they probably wont be able to complete a question, which can cause much frustration.  This resource, online is entirely free.  However, if you would like to have a physical copy at home, off-line, for your student to have easy access to, please consider purchasing the e-book - Kindergarten to Sixth Grade Geometry Dictionary.For just \$5.95 - it is excellent value!

## A Glossary of Geometry Words starting with Q-R  Quadrangle: A polygon with four angles and four sides.   Quadrant (circle): A quarter of a circle or a circles circumference.   Quadrant (Cartesian Plane): Any quarter section of the plane made by the intersection of the X and Y-Axes.   Quadrilateral:  A polygon with four sides.   Quarter: One of four equal parts.   Radius: Distance from center to circumference of a circle.  Ratio: A comparative value of two or more amounts.   Ray:  A line with a start point but no end point.   Rectangle: A quadrilateral with four right angles and two pairs of parallel lines.   Rectangular prism: A polyhedron - a prism with two identical rectangles - also known as a cuboid.   Reflection:  A mirror image.   Reflex angle: Any angle between 180 degrees and 360 degrees.  Revolution: One complete turn through 360 degrees.   Rhombus: A parallelogram with four equal sides and opposite angles of equal size.   Right Angle: An angle measuring 90 degrees.  Rotation:  To turn an object.   Rotational Symmetry: If, when an object is rotated, it has the same outline as its original shape. 