
Math
Circle Solutions
For 1-3, Consider a circle with endpoints of a diameter of (7, 13) and (-3,-11).
1. Identify the Center, be sure your answer is an ordered pair. (5 pts)
2. What is the length of the Radius? (5 pts)
3. Write the equation of a circle in standard form. (5 pts)
For 4-6, consider the circle r2 + y2 = 25 (5 pts each)
4. What is the center of the circle?
5. What is the radius of the circle?
6. The tangent line to a circle may be defined as the line that intersects the circle in a
single point called the point of tangency. Write the equation of a vertical line that
is tangent to the circle at (5,0). Remember to write your solution as an equation.
For 7-8: The points (-9, 4), (-2, 5), (-8,-3) and (-1, -2) are the vertices of a square inscribed
in a circle, similar to the one below. You may want to sketch your own graph to assist you
in answering this question.
7. Find the equation of the circle in standard form. (8 pts)
S. Find the area that is outside of the square but inside the circle.
Round to the nearest tenths. (8 pts)