Finding a Deflection Angle ~Video

If a building has angle built into it, the user must find the deflection angle in order to input vectors into the sketch to accurately sketch the building.

How to find the angle of deflection on a building with an angle.

1. Build a right triangle out of the parallel lines (should be two different lengths)
2. Fill in known measurements
3. Identify the deflection angle
4. Solve for the deflection angle (trigonometry calculators online are very useful)
   

1. Build a right triangle out of the parallel lines.
2. Fill in known measurements.
40.9+7.6+41.1=89.6
168.5-155.5=13
3. Identify the deflection angle.

4. Solve for the deflection angle.

Use a scientific calculator or trig calculator online.
a. Divide the opposite by adjacent.
13/89.6=.1451 (rounded)
b. Input Inv, tan-1, input dividend, and equals
The deflection angle is 8.3 (rounded).

See Calculating a Vector to see how to turn a deflection angle into a vector.