| The figures in the right can explain the 3 theorems. | |
| Inscribed angles are always equal. |  |
| Tangent chord theorem. |  |
| Sum of diagonal is 180 degrees. |  |
| The figures in the right can explain the 3 theorems. | |
| Inscribed angles are always equal. | |
| Tangent chord theorem. | |
| Sum of diagonal is 180 degrees. | |
| Drag the red point to move the points. What do you observe? |