Vertical Angles
Vertical angles are formed by intersecting lines. <AED and <CEB are vertical angles. <AEC and <DEB are vertical angles.
#verticalangles#oppositeanglesareequal#lesson10
Use the applet to practice finding the relationship between vertical angles.
Use points A, B, C, and D to change the angle values. Make a conjecture about the angle measures of a pair of vertical angles.
What do you notice about the red angles?
What do you notice about the blue angles?
If <AED is 134°, what is the value of <CEB?
If <AED is 134°, what is the value of <DEB?