<p>Formulas for Area and volume of Different Shapes:</p>
<p>Triangle:</p>
<p>Herons Formula: A=sqrroot(s(s-a)(s-b)(s-c)) where s is the semi-perimeter
Equilateral Triangle ONLY: A=((s^2)sqrroot(3))/4
A=.5(ab)sinC where C is the angle formed by sides a and b
A=.5bh</p>
<p>Square:</p>
<p>A=s^2
A=(d^2)/2 where d is the diagonal</p>
<p>Rectangle </p>
<p>A=bh</p>
<p>Rhombus</p>
<p>A=bh where h is the altitude
A= (d1d2)/2 where d1 and d2 are the diagonals
A=(s^2)sin(a) where s is any side and a is any interior angle</p>
<p>Parallelogram</p>
<p>A=bh</p>
<p>Trapezoid</p>
<p>A= (b1+b2) x h x .5</p>
<p>Rectangular Solid: </p>
<p>Surface Area= 2lw+2lh+2wh
Volume= L x w x h</p>
<p>Prisms</p>
<p>V=Bh
Surface Area=2b+Ph where b is the area of the base and P is the perimeter of the base</p>
<p>add on to this list</p>
<p>About that problem, its D. The range is the “up and down” shift, and is the coefficient before sinx/cosx. doesnt matter for the range if its positive or negative. </p>
<p>Another one-diagonal of a cube: s^1/3</p>
<p>Also, what books do you guys use to study…and is the blue book practice test accurate?</p>
<p>This one was important for May’s:
If a 3d object is similar to another and the ratio of their areas is k, then the ratio of their side lengths is k^1/3
For a 2d object, if the ratio of the areas is k, then the ratio of sides is k^1/2</p>
<p>Thanks! Another Barrons question…
If a square prism is inscribed in a right circular cylinder of radius 3 and height 6, the volume inside the cylinder but outside the prism is
A) 2.14
B) 3.14
C) 61.6
D) 115.6
E) 169.6 </p>
<p>Specifically, I don’t understand how to calculate the volume of the square prism…</p>
<p>since the radius is 3, the diagonal of the square prism (cube? is it?) is 6</p>
<p>how are you guys doing on the sparknotes tests? I’m only getting like 700 cuz i can never finish them… ._. how about you guys?</p>
<p>I got 800 on sparknotes and 800 in May</p>
<p>ok, so I am about to take a barron’s practice test, is 650+ on barron’s a 800? What is the conversion? thanks</p>
<p>600+ on barrons is 800 on the real thing</p>
<p>^ are u sure? I just finished one and got a 650? =/ I feel really stupid lol. How many do u guys omit on barron’s?</p>
<p>I got a 740 in the Barron’s book and a 790 on the real thing. You can’t automatically get an 800 just because you get a certain score on practice tests, though the Barron’s problems are harder. Whenever I take practice tests I omit none of them, and when I took the Math 2 test I omitted two.</p>
<p>Well, I never have enough time to do like the last 7 in barron’s? Do you have any time-management tips?</p>
<p>^ Rely on your calculator for questions that you can do by hand such as “Which of these are the zeros of the following equation…” Graphing saves you a lot of time</p>
<p>hey, can someone please explain the concept of ellipses and circles (in terms of formula with relation to graph)? the barrons book has them but i find the explanations too complicated :P</p>
<p>What is 700 on sparknotes?</p>
<p>^sparknotes is pretty accurate supposedly so around 700 on the real thing. I used my calc more and scored a 720 on barron’s diagnostic. Do you guys know any handy programs for your calculator other than quadratic?</p>
<p>Balls. I thought I was good at math, I got 760 on SAT 1. Best I’ve done on any practice for math was 760 on a PR. I’ve only taken 3 tests total so I guess there is still room to improve but this is surprisingly difficult.</p>
<p>Meanwhile I’ve been acing every USH one I’ve taken (like 3 wrong) and I though history was a weakness…</p>
<p>Hey all, I got a 750 then a 770 on two sparknotes test…</p>
<p>Is Sparknotes a lot easier?</p>
<p>^ its supposed to be the same difficulty as the real thing</p>
<p>I think Sparknotes might be a bit harder… I got a much better score on the test from the CB book than I did on those.</p>