Interpreting Graphs: Examples of Circle Graphs
This clip explores circle graphs in depth. It explains that each part of these graphs is called a sector. The clip explains that the sum of the values in the graph must equal 100%, then provides practical problems, including one in which the value o...
Angles, Arcs and Sectors: Summary: Angles, Arcs and Sectors
This clip revisits some of the essential points in the lesson on angles, arcs and sectors, including angle measurement and special angle relationships that occur when lines intersect. The clip also mentions angle measurement in circles, and explains...
Angles, Arcs and Sectors: Angles, Circles and Sectors
This clip looks at the sector, a fraction of a circle's area formed by a central angle and its arc. "We can find the area of a sector," the clips explains, "
by multiplying the ratio of the central angle to the circle by the area of the circle."
Angles, Arcs and Sectors: Introduction to Angles
This clip explains what constitutes an angle and provides a brief discussion of the fields in which angle measurement is especially critical. The clip then defines a number of terms that are fundamental to understanding angles, including "vertex" an...