The answer is a.the equation is true because the sum of 67 and 33 is equivalent to the sum of 70 and 30. this is because when you add 67 and 33 together, you will get 100. And when you add 70 and 30, you will still get 100. This means that the sum is equivalent, making A the correct answer.
The radius is the distance from the center to a point anywhere along the edge of the circle. To find the distance between these two points, use the distance formula.
