10 2 LINES TANGENT TO A CIRCLE View

10 -2 LINES TANGENT TO A CIRCLE View Slideshow, Don’t Just Click Through It! HOMEWORK: 16 -20

IN THIS CHAPTER I CAN… • 10 -1: find arc length and sector area of a circle • 10 -2: use properties of tangent lines to solve problems • 10 -3: relate the length of a chord to its central angle and the arc it intercepts • 10 -4: use the relationships between angles and arcs in circles to find their measures • 10 -5: use the angle measures and segment lengths formed by intersecting lines and circles to solve problems

BY THE TIME I WALK OUT OF CLASS TODAY • I can identify lines that are tangent to a circle using angle measures and segment lengths. • I can solve problems involving tangent lines.

VOCABULARY If a line passes through a circle, it touches the circle at 2 points. Is it possible to draw a line that only touches the circle at 1 point?

VOCABULARY Tangent Line – a line that touches the circumference of a circle only once Point of Tangency – the point that a tangent line touches a circle Notes: this line is perpendicular to the radius

PRACTICE • 4 r 7 r

PRACTICE • 4 6 9 6

PRACTICE •

LAST THOUGHT •

LAST THOUGHT •

STOP END OF 4/22 CONTINUE TOMORROW

10 -2 LINES TANGENT TO A CIRCLE View Slideshow, Don’t Just Click Through It! HOMEWORK: 10 -1/10 -2 PRACTICE WKS

PRACTICE There is a worksheet on my website called “ 10 -1/10 -2 Practice WKS”. You don’t have to print it, you can just copy the questions on a separate sheet. Submit a picture of your work to turnitin. com for credit. Check-In Quiz tomorrow.

STOP END OF 4/23 CONTINUE TOMORROW

10 -2 LINES TANGENT TO A CIRCLE View Slideshow, Don’t Just Click Through It! HOMEWORK: NONE

QUIZ There is a link for a Check-In Quiz on my website. This WILL go in the gradebook. You will not be able to click on it until 4/24. It must be done before the end of the day.