A 3 by 4 rectangle is inscribed in circle. What is the circumference of the circle?
Choose the correct answer:
A) 2.5π	B) 3π	C) 5π	D) 4π	E) 10π
If a rectangle is inscribed in a circle, then the diagonal of the rectangle = diameter of the circle.   In this case, diagonal = (9 + 16)^(1/2) = 5   Hence the radius = 2.5   5πircumference = 2πr = 2π*2.5 = 5π   5πorrect Option: 5π2 *2.5= 
<gadget id="calculator">2 *2.5</gadget>
<output>5</output>
5π   5πorrect Option: 5π
<result>C</result>
A 3 by 4 rectangle is inscribed in circle. What is the circumference of the circle?