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.
With your help, I can make this the best resource online for parents tutoring their children in basic geometry.

I am sure you will find all the information and worksheets you need here, however if there is anything you cannot find please don't hesitate to contact me or simply visit the K6Math CafĂ© and join the conversation!

I love to hear from my readers, and with a little feedback and a few suggestions I can make this a great resource for parents, teachers and tutors alike.

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