pls people..i am a ssc student new portion..maharashtra state board...my geometry is very bad...pls ..no one is able 2 make me understand the first 2 chapters of geometry..i dotn have my 9th standard concept clear also...i dont want 2 waste my markas because of geometry and also algebra..pls tell me how 2 learn the first 2-3 lessons of geometry and algebra online or with some cd's..please help me..teachers please..i have done many classes..wasted money ..but i am not able 2 understand geometry..even if i byheart 30-60-90 therem..i dont understand...i am good with other subjects..but maths is worst..its my nightmare
2007-06-19 04:54:57 · 2 answers · asked by wild child 2 in Science & Mathematics ➔ Mathematics
I would suggest you work on your algebra first before advancing into geometry. If you want to post specific questions, such as the 30/60/90 theorm, answerers will be happy to help you.
To understand the "30/60/90 theorm", you need to understand Phythagorean theorm for a right triangle. If the hypotenuse of such a triangle is "h", and the other two sides are "a" and "b", then
h^2 = a^2 + b^2. a and b can be any real positive number, and not just integers.
Say you have a right triangle with an angle "A" formed by the vertex of h and a, and an angle "B" formed by the vertex of h and b. Moreover, let angle "A" be 30 deg. Angle "B" MUST be 60 deg, since they are compliments. Now, set the shortest side, side "b" = 1. From triginometry, you can show that the Tangent 30 deg = sqrt 3/2. From the definition of a Tangent, if side "b"=1, then side "a" = sqrt3/2. Then from Phythagorean theorm, the hypotenuse is twice the shortest side or 2.
If this doesn't make sense, I suggest you go back to algebra and get that understood before progressing further.
2007-06-19 05:12:55 · answer #1 · answered by cattbarf 7 · 0⤊ 0⤋
get a teacher
2007-06-19 12:02:04 · answer #2 · answered by (^_^) CHiccaaqui(^_^) 4 · 0⤊ 0⤋