Mathematics

Qis forQuarter (fraction)

This apple has been cut into quarters. This means it has been cut into four equal sized pieces.

Generated image of someone measuring a wheel

Photographic Dictionary / Generated illustration

Ris forRadius (circle)

Radius is the distance from the center of a circle or a sphere to its edge. In math and science, radius helps you find other things like the diameter (twice the radius) and the area of a circle.

Mathematics

Alan Levine / CC BY-SA

Tis forThirds

This stone has broken into thirds. This means it has been cut into three equal sized pieces. See also third.

Mathematics

Qis forQuarter (fraction)

Ris forRadius (circle)

Tis forThirds

And also ...