# Math Help - circumference of the circle

1. ## circumference of the circle

this one is hard..

find the circumference of the circle circumscribing a rectangle with sides 8 and 6 m respectively

2. Originally Posted by aeroflix
this one is hard..

find the circumference of the circle circumscribing a rectangle with sides 8 and 6 m respectively
1. Draw a sketch.

2. The diameter of the circle is a diagonal of the rectangle.

3. Use Pythagorean theorem to calculate the length of the diagonal.

4. Calculate the circumference c of the circle: $c = 2 \pi r$