ok so i have to take the SAT this spring. i know algebra like the back of my hand but i sadly have forgotten most if not all of my geometry!!! i hear geometry is a huge factor on the SAT
how can i brush up on my geometry really well and quickly without having to take another class!!! and what are some key concepts that i need to know about geometry to possibly do well in that area of the test?? please please help!!!!!
2007-09-26 10:57:39 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
here are some hints
1. . sum of the 3 angles of a triangle is 180 degrees
2. . three point coordinates are on line if the slope of the line between the two points are the same
3. . parallel lines have same slope
4. . two lines are perpendicular if their slopes follow the equation
. . . . . . m1= -1/ m2
5. area of triangle. . .1/2 b h
6. . area of trapezoid . . . 1/2 (a+b) h
7. . area of circle . . pi r^2 = pi/4 d^2
8. . Pythagorean theorem . . . c^2 = a^2 + b^2
9. . in equality of fraction .. . . a / b = x / y . . . . cross multiply
. . . . . . ay = bx . . .you can solve one of the variable
10. . study on proportion or congruent
2007-09-26 11:16:15 · answer #1 · answered by CPUcate 6 · 0⤊ 0⤋
a million. grow to be slope-intercept kind... 2x - y = 4 ===> y = 2x - 4 (y = mx + b) For it to be parallel, the equations could desire to have an identical slope. however the (b) term is distinctive for the two... so which you desire an equation to get (b)... b = -2x + y Use the coordinate factors to locate (b)... (x,y) ==> (-3,-11) so x = -3 and y = -11 b = -2(-3) + (-11) b = -5 answer: y = 2x - 5 2. placed the equation into slope intercept kind... 5x + 3y = 8 =====> y = -5/3x + 8/3 Perpendicular strains have opposite slopes meaning the sign transformations and the huge sort receives flipped... y = -5/3 + 8/3 ====> answer: y = 3/5 + 8/3 3. it incredibly is very almost comparable to #2 different than which you're given coordinates to parent the equation and the (b) is distinctive like #a million... i'm going to easily coach you devoid of rationalization... y = a million/2x + 5 (5) = a million/2(-2) + b b = 6 answer: y = -2x + 6 4. For dilation - some thing that receives larger. Transition (i think of is what your attempting to assert) - some thing that shifts (strikes)... 5. looking the edge of a triangle... do not you in basic terms upload each and every of the factors? 6. basically upload each and every of the factors and locate 0.5 of the respond... 10 + 14 + sixteen = 40 40/2 = 20
2016-10-20 02:00:24 · answer #2 · answered by ? 4 · 0⤊ 0⤋
If you know algebra, them geometry is not a big problem.
Almost every section of geometry relies on your understanding of algebra 1 and 2.
You can do this:
1-hire a local tutor
2-buy home instructional vhs or dvd lessons from mathmadeeasy.com or standarddeviants.com
3-or, e-mail your geometry questions to freemathhelp.com
2007-09-26 11:06:29 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Your best bet is to go to site listed below:
http://aleph0.clarku.edu/~djoyce/java/elements/elements.html
Learn from the master himself, EUCLID, the father of Geometry
2007-09-26 11:04:25 · answer #4 · answered by ironduke8159 7 · 0⤊ 0⤋
geometry is all about lines and angles and figures..........try this site http://www.cut-the-knot.org/geometry.shtml
2007-09-26 11:07:00 · answer #5 · answered by Anonymous · 0⤊ 0⤋