http://www.ck12.org Chapter 9. Circles
9.10 Segments from Secants
Here you’ll learn how to solve for missing segments from secants intersecting circles.
What if you wanted to figure out the distance from the orbiting moon to different locations on Earth? At a particular
time, the moon is 238,857 miles from Beijing, China. On the same line, Yukon is 12,451 miles from Beijing.
Drawing another line from the moon to Cape Horn (the southernmost point of South America), we see that Jakarta,
Indonesia is collinear. If the distance from Cape Horn to Jakarta is 9849 miles, what is the distance from the moon
to Jakarta? After completing this Concept, you’ll be able to solve problems like this.
Watch This
MEDIA
Click image to the left for use the URL below.
URL: http://www.ck12.org/flx/render/embeddedobject/52428CK-12 Foundation: Chapter9SegmentsfromSecantsA
MEDIA
Click image to the left for use the URL below.
URL: http://www.ck12.org/flx/render/embeddedobject/10285Guidance
In addition to forming an angle outside of a circle, the circle can divide the secants into segments that are proportional
with each other.