Changes

∠PAQ=2∠OPQ

∠PAQ=2∠OPQ

=Problem-2=

=Problem-2=

In the figure two circles touch each other externally at  P. AB is a direct common tangent to these circles. Prove that<br>a). Tangent at P bisects AB at Q<br> b). ∠APB=90°  (Exescise-15.2, B.3)

In the figure two circles touch each other externally at  P. AB is a direct common tangent to these circles. Prove that<br>a). Tangent at P bisects AB at Q<br> b). ∠APB=90°  (Exescise-15.2, B.3)<br>

[[File:fig2.png|400px]]

[[File:fig2.png|400px]]