To use properties of a tangent to a circle.

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Presentation transcript:

To use properties of a tangent to a circle. 12-1 Tangent Lines To use properties of a tangent to a circle. Students will draw diagrams of circles and tangent lines and identify important relationships, such as segment lengths and angle measurements.

12-1 Quiz The following questions are to help you decide how well you understood today’s lesson. Be sure to record the number you get right on your portfolio sheet! Please ask if you miss one and don’t understand why 

1. Assume that lines that appear to be tangent are tangent 1. Assume that lines that appear to be tangent are tangent. O is the center of the circle. Find the value of x. (Figures are not drawn to scale.) 291 69 55.5 222

18.1 18.7 21.6 19.3

33 38 46 66

78 39 102 24 Non-Response Grid

5. Pentagon RSTUV is circumscribed about a circle 5. Pentagon RSTUV is circumscribed about a circle. Solve for x for RS = 10, ST = 13, TU = 11, UV = 12, and VR = 12. The figure is not drawn to scale. 11 8 4 6 Non-Response Grid

Assignment 12-1 p.767-768 #6-26even Be sure to RATE your understanding of the lesson 4-3-2-1-0 after you finish it AND give me one complete sentence as to why you rated yourself that way then summarize what the lesson was about in a couple of complete sentences.