answer the following questions
Answers
Answer for Part 1
Given,
AB = CD
AB ║CD
To Prove,
ΔAOB ≅ ΔDOC
Proof
i) AB = CD [Given]
AB║CD and AD is the transversal.
∴ ∠BAO = ∠CDO [Alternate Interior Angles]
AB║CD and BC is the transversal.
∴ ∠ABO = ∠DCO [Alternate Interior Angles]
∴ ΔAOB ≅ ΔDOC by ASA Congruency
ii) AO = DO (CPCT)
iii) BO = CO (CPCT)
Hence Proved!
Answer for Part 2
In figure,
∠ECD = ∠BCA = 53° [V.O.A]
AB ║ DE and BD is the transversal.
→ ∠x = ∠D [Alternate interior angles]
→ ∠x = 45°
In ΔABC
→ ∠A + ∠B + ∠C = 180° [A.S.P of a triangle]
→ ∠A + 45° + 53° = 180°
→ ∠A + 98° = 180°
→ ∠A = 180° - 98°
→ ∠A = 82°
AB║CD and AC is the transversal
[Alternate interior angles]
In Δ CDE
∠ECD + ∠CDE + ∠CED = 180° [A.S.P of a triangle]
53° + 45° + 3y + 1 = 180°
99° + 3y = 180°
3y = 180° - 99°
3y = 81°
y =
y = 27°
[If you want to find the value of the 'angle' CED, you need to substitute the value of 'y' in 3y + 1]
----------
Therefore the values are
x = 45°
y = 27°
--------
Thank You!