Tutorial 19

Dear students,
posted the solution, hope that you find it useful... Added answer for question 13 on 25/4 ...

Tutorial 16

Dear students, i hope that you are preparing for your upcoming monthly test.  Attached here are the answers for Q8 and 12 requested by Kar Hau, others please check your answer.  I expect you to pass up your tutorial 16 on monday and do prepare for deductive geometry test on monday too. Have a good weekend.

Tutorial 15

Another tetrahedron, by now you should be quite familiar with this figure ....