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This is part 2 to Circles Lesson 1 " Circles and Geometry
When a tangent and a radius intersect,there must be a right angle,and a right triangle can be formed.

Video Guide
0:33 Review Theorem 1 In a plane,a line is tangent to a circle if and only if the line is perpendicular to a radius of the circle and it's
endpoint
0:43 Solves question 1 Find the value of x AB is a radius and BC is a tangent of A
3:24 Completes question 2 Using the Pythagorean Theorem in order to find the radius of a circle. Provides a decimal and radical answer
4:58 Completes question 3 Using the Pythagorean Theorem in order to find the radius of a circle
8:44 Question 4 Finding the radius of a circle
12:12 Checks the answer to the two practice problems

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