In the diagram , X ,Y and Z are the points of contact of tangents BC , CA and AB respectively to a circle with centre O . If angle ACB is a right angle , prove that angle AOB =135 degree .

Printable View

- November 7th 2009, 06:33 AMthereddevilsGeometry (1)
In the diagram , X ,Y and Z are the points of contact of tangents BC , CA and AB respectively to a circle with centre O . If angle ACB is a right angle , prove that angle AOB =135 degree .

- November 7th 2009, 06:58 AMGrandad
- November 7th 2009, 06:44 PMthereddevils