A Practice
See Problem 1.
Algebra Lines that appear to be tangent are tangent. O is the center of each circle. What is the value of x?
See Problem 2.
Earth Science The circle below represents Earth. The radius of Earth is about 6400 km. Find the distance d to the horizon that a person can see on a clear day from each of the following heights h above Earth. Round your answer to the nearest tenth of a kilometer.
See Problem 3.
Algebra In each circle, what is the value of x, to the nearest tenth?
See Problem 4.
Determine whether a tangent is shown in each diagram. Explain.
See Problem 5.
Each polygon circumscribes a circle. What is the perimeter of each polygon?