angle and shapes. angles formed in triangles

Mathematics.

1. POLYGONS SUM OF INTERIOR ANGLES IN A POLYGONS.

2. FIND X

3. FIND X

4. Circles.

5. Cyclic Quadilaterals

6. Find the missing angles.

7. Tangent

8. TANGENT AND RADIUS RELATION.

9. Find angle DPB

10. ANGLES IN A SEMICIRCLE.

11. Angles in a semicircle.

12. Find y.

13. Angles the centre vs angles at the circumference.

14. Find b.

15. Find x.

16. Opposite angles in a cyclic Quadrilateral.

17. Find x and y.

18. Angles in the same segment.

19. Find the missing angle.

20. SUMMARY.