A circle has a diameter of 10mm. Find the circumference of the circle using 3 as the estimate of .
Find the circumference of the circle using 3.14 for .
Find the circumference of the circle using 3.14159 for .
What do you notice about the estimate used for and the circumference of the circle?

20mm

I'm sorry if it's wrong and I honestly hope it helps

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.

step-by-step explanation:

the answer is 128