1995 年

In the figure, $BDC$ is a straight line. Arrange $AD$, $BD$ and $DC$ in ascending order of magnitude.

In the figure, $ABCD$ is a semicircle. $\angle CAD=$

In the figure, $O$ is the centre of the circle, $POQR$ is a straight line. $TR$ is the tangent to the circle at $T$. $\angle PRT=$

In the figure, $ABCD$ is a cyclic quadrilateral. If $\angle DAB=110^\circ$ and $BC=BD$, find $\angle DAC$.

In the figure, $AB=AC$ and $AD=AE$. $\angle DAC=$

In the figure, $\angle ADE=\angle ACB$. Find $x$.

In the figure, the equation of the straight line $L$ is

In the figure, $OA=AB$. If the slope of $AB$ is $m$, find the slope of $OA$.

The table below shows the centres and radii of two circles $C_1$ and $C_2$.

Which of the following may represent the relative positions of $C_1$ and $C_2$ ?

In the figure, the equation of the circle is