Question

Q15) In given figure,<OAB=75,<OBA=55° and <OCD=100° then ODC=?
1. 20°
2. 25°
3. 30°
4. 35°​

Answer 1

Answer:

in ∆AOB

ANGLE AOB=180°-75°-55°=50°

ANGLE AOB=ANGLE COD=50°[opposite angle ]

now in ∆COD

ANGLE ODC=180°-100°-50°=30°