Δbcd is rotated 80° clockwise about the origin to form δklm. if m∠klm=30° , what is m∠bcd?
m∠bcd=30°
m∠bcd=50°
m∠bcd=80°
m∠bcd=110°

The triangle is merely rotated. No other changes have been done to it whatsoever. Therefore, the measure of the angle should still be the same. Since angle KLM is equal to 30 degrees, then the measure of angle BCD should also be equal to 30 degrees.

 m∠BCD=30°