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編號	問題
1	Find x.
2	Find y.
3	Find x, y, z.
4	Prove that AB // CD in the figure.
5	In the figure, a = b. Prove that AB // CD.
6	In the figure, AB and CD meet at O. EO ^ AB and Ð EOD = 55o. Find b and c.
7	In the figure, the three straight lines AB, CD and EF meet at a point O. Find t.
8	In the figure, Ð AOC = Ð BOD = 90o and ÐCOD = 38o. Find a, b and c.
9	In the figure, AB // CD // EF. The transversal PT cuts AB, CD and EF at Q, R and S respectively. Given that ÐAQR = 40o, find x and y.
10	In the figure, AB // FE. Find p + q + r + s.
11	In the figure, BA // EF, Ð ABC = 130o, ÐBCD = 70o and reflex ÐCDE = 300o. Find ÐDEF.
12	Given the figure as shown.     (a) Find the measure of m.     (b) Prove that AB // XY.
13	Refer to the given figure.     (a) Prove that AD // FJ.     (b) Find the measure of y.
14	Refer to the given figure. Given that ÐPQR = 75o, ÐQRT = 150o and RS is the angle bisector of ÐQRT. Prove that PQ // RS.
15	Refer to the figure. Given that p = q and AD // BC. Prove that BA // CD.
16	Refer to the figure. Prove that     (a) AB // CD     (b) BC // DF
17	In the given figure, ÐTPQ = 50o, ÐPUR = 95o and ÐSRV = 45o. Prove that PQ // RS.
18	In the figure, AOB is a straight line. OC is the angle bisector of ÐAOD and OE is the angle bisector of ÐBOD. Prove that ÐCOE = 90o.