Question

Why radius is singular form?

Answer 1

Answer:

The plural of the word 'radius' is actually 'radii'. Instead of adding an '-s' on the end to make it plural, a second 'i' is added because radius is...

Answer 2

Answer:

Sometimes when you make a word plural, it changes in a way you wouldn't expect. The word 'radius' is one of these words. Continue reading to learn the plural of radius.