HKCEE - 2006 - Paper 2 -

Ans: B
In $\Delta OBC$,

$\begin{array}{ll}
OB=OC & \t

Ans: B
Join $OB$.

In $\Delta OAB$,

$\begin{array}{ll}
OB = B

Ans: A

Join $BC$. Consider $\Delta ABD$ and $\Delta ACB$,

$\

Ans: A

Join $AB$. Since $A$, $B$, $C$ and $D$ are four points o

Ans: B
Since $AB$ is the tangent to the circle at $B$, then we h

Ans: B

Join $AD$. Since $AB$ is a diameter of the circle $ABCD

Ans: C
Let $\angle CBD = x$. Since $A$, $B$, $C$ and $D$ are fou

Ans: C

Denote $O$ the centre of the circle. Add a perpendicul

Ans: B
Denote $O$ the centre of the circle $ABCD$ and $Z$ the m

Ans: C
Since $XY$ and $XZ$ are the tangents to the circle $ABC

Ans: D
Since $AE//BD$, then

$\begin{array}{rcl}
\angle FA

Ans: C
Join $AC$.

Since $DA$ is the tangent to the circle at $A