(maybe) Useless question #3 (or 4)! A circle has a radius of π. What is the circumference?

The circumference of a circle with radius is units.

Step-by-step explanation:

The circumference of a circle is defined by the equation , where stands for the circumference and stands for the radius.

Substituting the variables with the known values, we get the following:

answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)