October 2012 MATH ACT

<p>Can somebody please say what they got for the frickin isosceles triangle problem? I made the angles 50, 65, and 65, but then I am not sure if I did it right. Were the 2 isosceles triangles similar?</p>

<p>lesley, 20, 40 WAS correct. 16, 32 was not because we forgot to add the 4, 8</p>

<p>It is (20,40) you have to add 16 and 32 to the coordinates of the other point.
The isosceles triangle is 75 since the exterior angle is always greater than the opposite interior angles which were 65.</p>

<p>Oh, phew! I misunderstood. I thought you guys said it wasN’T 20,40. Lol.</p>

<p>@CGdaBes–sorry, I am not entirely following you. How did you get 75?</p>

<p>It was 16squreroot of 5 from b to c. You had to find the distance from a to b. answer was 20, 40. And yes I thin it was 8/9 both plus and minus</p>

<p>what was this isoceles triangle problem? I can’t remember it either!</p>

<p>Hello friends how are you doing</p>

<p>@ugotserved834</p>

<p>Only answer choice greater than 65 was 75.</p>

<p>@CDdaBEs - wasn’t 72 also a choice?</p>

<p>My really smart math friend got the three circle problem to be 6pi not 3pi. I mean this guy wins all these national math awards and stuff. The reason he gave was the 4 circles would together make the circumference of 3, so since their radii are 1,
circum=2(pi)r
answer=3(2)1(pi)= 6pi</p>

<p>^yellow17
I believe not, 72 was the answer to the pentagon problem.</p>

<p>^KindaNervous
It was asking for area not circumference.</p>

<p>Ah yes… that’s what I was thinking of.</p>

<p>Ok, how is the answer to the circle problem 3 pi? im not following…</p>

<p>does anyone remember the n+n thing where both of the numbers were negative, i think. Was it H</p>

<p>Yes the answer was n + n</p>

<p>ugh i’m an idiot. The absolute value inequality question should’ve been empty set, but I put the union answer…</p>

<p>^Nivers
It was area of 4 circles of radius 1 - area of 1 circle with radius 1 (the sectors add up to 360 degrees) so it’s just 3 circles. 3 pi (1)^2=3pi</p>

<p>^Orangecream
It was n+n since -2 < 2n < 0 and 2n < n^3 for -1 < n < 0</p>

<p>was it ac 58 and H? i was kinda lost</p>

<p>@CGdaBes - yeah okay, that was also my thought process but 360 degrees is equal to 2 pi… so 4 pi - 2 pi = 2 pi</p>