A 3 by 4 rectangle is inscribed in circle. What is the circumference of the circle?
Solution
Correct Answer: Option C
1. Identify the relationship between the rectangle and the circle:
Since the rectangle is inscribed in the circle, the diagonal of the rectangle will be the diameter of the circle.
2. Find the length of the diagonal:
We know the sides of the rectangle are 3 and 4 units long. The diagonal can be found using the Pythagorean theorem:
Diagonal
2 = 3
2 + 4
2Diagonal
2 = 9 + 16
Diagonal
2 = 25
Diagonal = 5 (as length cannot be negative)
3. Calculate the circle's circumference:
Knowing the diameter, we can find the circumference using the formula:
Circumference = π * diameter
Circumference = π * 5
Therefore, the circumference of the circle is 5π.