The police dog helped to find the criminal.

I use a pedometer every day to count my steps.

She is learning how to use adjectival nouns.

He is learning how to use adjectives.

This design is a quadrilateral.

What kind of polygon is this?

This octagonal table is very unique.

He is considered to be a calculating person.

He installed a sundial in the garden.

The atomic clock shows a very accurate time.