Saved Bookmarks
| 1. |
AB and AC are the tangents of the circle with center O.Show that the quadrilateral ABOC is a cyclic quadrilateral. |
|
Answer» AB and AC are tangents ∠B = ∠C = 90° ∠B + ∠C = 180° The sum of the four angles of a quadrilateral is 360°. ie, ∠A + ∠O = 180° The opposite angles of quadrilateral ABOC are complementary. ∴ ABOC is a cyclic quadrilateral. |
|