Students have a hard time remembering which line is the diameter in a circle, and which is the radius.
Show them this memory trick: when written alongside each other, “d” (diameter) is twice as tall as “r” (radius)!
This reminds them that the diameter of a circle is twice the length of the radius.
Do you have any tricks that help your students remember geometry concepts?
Download PDF of this on TeachersPayTeachers FREE