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Thanks Archman for the neat and simple solution. I've got the answer from her teacher yesterday but only check this thread today. The answer is exactly the same. It's easy to understand but I must admit it's quite hard to think of. Personally, I don't think this problem does any good to a...

Thanks for your quick replies, guys. I know this may sound like a joke to you and I wish it is a joke, but it's not. This problem IS for year 7 in Vietnam. My sister in law ask me this question and I can't explain to her using cos or sine rule:burn: I can use your solutions as a hint to...

Please indicate how many hours per lesson, how many lessons per week, what day do you want tutoring for. I live in Woodcroft area and willing to travel to Blacktown if it's not too far. I am experienced with 2,3,4 units maths.

Hi everyone, I'm new here and it's very nice to meet all of you. I have this problem which seems to be easy at first but turned out to be nasty:burn: Maybe there's an extremely easy way to solve it but it just doesn't come to my mind:confused: Here it is: Triangle ABC is isosceles where AB...