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.

Allow them access to this great geometry dictionary.

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.

If you searched this page for a geometry definition and did not find it - please contact me.
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