Respuesta :

The radius would be .5.

When the diameter of a circle is 1, the circle's circumference is equal to pi. 

The area would be .79

I hope this helped you!

Brainliest answer is always appreciated!
Well the radius is half the diameter so the radius is .5, the circumference is 2(pi)r or (pi)d, so it would be 3.141592654... Now finally the area it is (pi)r^2 so it would be about .79.

Radius=.5
Circumference= 3.14
Area=.79