OBSERVATION
On actual measurement of angles in one position of the strips :
1. ∠AOD = ................., ∠AOC = ...................
∠COB = ................., ∠BOD = .................
Therefore, ∠AOD = ∠COB and ∠AOC = ............ (vertically opposite angles).
2. ∠AOC + ∠AOD = ............., ∠AOC + ∠BOC = ...................,
∠COB + ∠BOD = ...................
∠AOD + ∠BOD = ................... (Linear pairs).
3. ∠AOD + ∠AOC + ∠COB + ∠BOD = .................... (angles formed at a point).
class - 9th activities
On actual measurement of angles in one position of the strips :
1. ∠AOD = ................., ∠AOC = ...................
∠COB = ................., ∠BOD = .................
Therefore, ∠AOD = ∠COB and ∠AOC = ............ (vertically opposite angles).
2. ∠AOC + ∠AOD = ............., ∠AOC + ∠BOC = ...................,
∠COB + ∠BOD = ...................
∠AOD + ∠BOD = ................... (Linear pairs).
3. ∠AOD + ∠AOC + ∠COB + ∠BOD = .................... (angles formed at a point).
class - 9th activities
Answers & Comments
Answer:
Jack's father gave him 250 on Christmas. Jack bought a gift worth x for his younger sister and donated half of the remaining money at a church. Write a equation that represents the given situation if he has 50 now.