Finding the Missing Angle
- Ryan Shiffer
There are three different angles: <ABC (the larger angle) <ABD (one angle that makes up the larger angle) <DBC (the other angle that makes up the larger angle) By clicking and dragging a point on one of the rays, you can change the measurement of each of the angles. <DBC is missing. You can calculate the missing angle by subtracting the smaller angle (<ABD) from the larger angle (<ABC).
Create a variety of angles by dragging the points. Then create and solve three different problems using the formula below: <DBC = <ABC - <ABD For example, if <ABC = 140.35 and <ABD = 64.68, I would write: <DBC = 140.35 - 64.68 <DBC = 75.67 degrees