1. In the cyclic quadrilateral ABCD, the side AB is the diameter of the circle. If \(\angle ACD = 50^\circ\), find the measure of \(\angle BAD\).

2. ABCD is a cyclic quadrilateral. The sides AD and AB are extended to E and F, respectively. If \(\angle\) CBF = 120°, then find the measure of \(\angle\) CDE.

3. In the cyclic quadrilateral ABCD, the sides AB and AD are extended to E and F, respectively. If \(\angle\)CBE = 120°, find the measure of \(\angle\)CDF.

4. If ABCD is a cyclic quadrilateral and \(\angle\)A=120°, what is the measure of \(\angle\)C ?

(a) \(\cfrac{π}{3}\) (b) \(\cfrac{π}{6}\) (c) \(\cfrac{π}{2}\) (d) \(\cfrac{2π}{3}\)

5. In the cyclic quadrilateral ABCD, if \(\angle\)A = 120°, then the measure of \(\angle\)C in a circular sense.

(a) \(\cfrac{π}{2}\) (b) \(\cfrac{π}{3}\) (c) \(\cfrac{π}{6}\) (d) \(\cfrac{π}{4}\)

6. The center of a circle is O, and AB is its diameter. ABCD is a cyclic quadrilateral. If \(\angle\)ABC = 65° and \(\angle\)DAC = 40°, then the measure of \(\angle\)BCD is—?

(a) 75° (b) 105° (c) 115° (d) 80°

7. In the cyclic quadrilateral ABCD, if AB = AD, \(\angle\)DAC = 70° and \(\angle\)BDC = 50°, then what is the measure of \(\angle\)ACD?

(a) 30\(^o\) (b) 40\(^o\) (c) 50\(^o\) (d) 70\(^o\)

8. ABCD is a cyclic quadrilateral, and CD is extended up to point E. If \(\angle\)ADE = 92°, then what is the measure of \(\angle\)ABC?

(a) 88\(^o\) (b) 29\(^o\) (c) 92\(^o\) (d) 60\(^o\)

9. In the cyclic quadrilateral PQRS, the side PS is a diameter of the circle. If \(\angle\)PQR = 120°, then what is the measure of \(\angle\)SPR?

(a) 90° (b) 30° (c) 60° (d) 120°

10. In the cyclic quadrilateral PORS, the side PS is a diameter of the circle. If \(\angle\)PQR = 128°, then what is the measure of \(\angle\)SPR?

(a) 30° (b) 38° (c) 60° (d) None of the above

11. ABCD is a cyclic quadrilateral. Side AB is extended to point X. If \(\angle XBC = 82^\circ\) and \(\angle ADB = 47^\circ\), find the value of \(\angle BAC\).

12. In a circle centered at O, ABCD is a cyclic quadrilateral. Given: \(\angle ABD = 50^\circ\), \(\angle CAD = 28^\circ\), and \(\angle ADB = 32^\circ\) Find the measure of \(\angle BCD\).

(a) 72° (b) 52° (c) 62° (d) 82°

13. ABCD is a cyclic quadrilateral where AB \(\parallel\) DC, and O is the center of the circle. Given: \(\angle\)BOC = 80°, and \(\angle\)ACO = 10° Find the measure of \(\angle\)BAD.

14. ABCD is a cyclic quadrilateral, where \(\angle\)BCD = 100° and \(\angle\)ABD = 70°. Find the measure of \(\angle\)ADB.

15. In the cyclic quadrilateral ABCD, if AB = AD and \(\angle\)ABD = 30°, then find the value of \(\angle\)BCD.

(a) 90° (b) 30° (c) 45° (d) 60°

16. AB is extended to point X in the cyclic quadrilateral ABCD. If \(\angle\)XBC = 98° and \(\angle\)ADB = 45°, then what is the measure of \(\angle\)BAC?

17. O is the center of the circle, and AB is its diameter. ABCD is a cyclic quadrilateral. Given that \(\angle\)ABC = 65° and \(\angle\)DAC = 60°, find the measure of \(\angle\)BCD.

18. If the cyclic quadrilateral ABCD has its sides AB and DC extended to meet at point P, and sides AD and BC extended to meet at point Q, then given \(\angle\)ADC = 85° and \(\angle\)BPC = 40°, find the value of \(\angle\)CQD.

19. ABCD is a cyclic quadrilateral. If \(\angle\)ABC = 65° and \(\angle\)CAD = 40°, then find the value of \(\angle\)BCD.

(a) 70° (b) 25° (c) 115° (d) 90°

20. ABCD is a cyclic quadrilateral. If \(\angle\) BAD = 65°, \(\angle\) ABD = 70°, and \(\angle\) BDC = 45°, then find the value of \(\angle\) ACB.

21. In a circle centered at \(O\), \(AB\) is a diameter. \(ABCD\) is a cyclic quadrilateral. If \(\angle ADC = 120^\circ\), then the measure of \(\angle BAC\) is –?

(a) 60° (b) 40° (c) 50° (d) 30°

22. ABCD is a cyclic quadrilateral where AB is the diameter of the circle. If \(\angle\)ADC = 120°, then the measure of \(\angle\)BAC will be 40°.

23. ABCD is a cyclic quadrilateral with O as the center of the circle. Side DC is extended up to point P. If \(\angle BCP = 108^\circ\), calculate and write the measure of \(\angle BOD\).

24. When the sides AB and DC of a cyclic quadrilateral ABCD are extended, they meet at point P; and when sides AD and BC are extended, they meet at point Q. If \(\angle\)ADC = 85° and \(\angle\)BPC = 40°, then calculate the measures of \(\angle\)BAD and \(\angle\)CQD.

25. In a circle with center O, where BOC is the diameter and ABCD is a cyclic quadrilateral, if \(\angle ADC = 110^\circ\), then find the value of \(\angle ACB\).

26. Translate: ABCD is a cyclic trapezium with AD || BC. If \(\angle ABC = 75^\circ\), then find the measure of \(\angle BCD\).

(a) \(105^o\) (b) \(75^o\) (c) \(45^o\) (d) \(90^o\)

27. ABCD is a cyclic quadrilateral and O is the center of the circle. If \(\angle\)COD = 120° and \(\angle\)BAC = 30°, then what is the measure of \(\angle\)BOC?

28. In the cyclic quadrilateral ABCD, side AB is extended up to point X. If \(\angle\)XBC = 82° and \(\angle\)ADB = 47°, then what is the measure of \(\angle\)BAC?

(a) 45° (b) 45° (c) 35° (d) 60°

29. In the cyclic quadrilateral ABCD, side BC is extended up to point E. If \(\angle BAD = 140^\circ\), then find the value of \(\angle DCE\).

(a) 75° (b) 90° (c) 140° (d) None of the above

30. ABCD is a cyclic quadrilateral. If \(\angle ADB = x^\circ\) and \(\angle ABD = y^\circ\), then the measure of \(\angle BCD\) will be \((x + y)^\circ\).