SAT Lesson 1 - Triangles (P6 of 6)

My first SAT lesson online! It's a 6 part video on Geometry Triangle problems, taken from "The Official SAT Study Guide" by the College Board, so go get it! 8 questions total (even though I say 10 in the intro):

- p407 question #2 (video p1)
- p411 question #11 (video p1 & p2)
- p412 question #15 (video p2)
- p425 question #9 (video p2 & p3)
- p462 question #14 (video p3)
- p475 question #15 (video p3, p4 & p5)
- p475 question #11 (video p5 & p6)
- p491 question #15 (video p6)


Check out miteach.wordpress.com for more useful tips!

Happy studying, and don't forget to enjoy life while you're at it!

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[dngt]

how did you know what goes were? how did you get to (x+4)^2 = x^2+(x+2)^2

[MiTeach]

ah. In general, we know that a^2 + b^2 = c^2 where a and b are the legs of the triangle and c is the hypotenuse. if a=x, then b=x+2 and c=x+4 since the problem says that the sides are consecutive even integers, and x is the smallest side. Just plug into the 1st equation...

[singurhrtoutx33]

For the first problem, I don't understand why you couldn't of have used 50, 50, and 30 instead of 30, 30, and 50? Please explain.

[MiTeach]

hi again. you are looking for the triangle with the smallest perimeter! 30+30+50 is less than 30+50+50

[SpinningBirdKick1]

I understood the quadratics shit at the end. But i plugged in numbers that were consecutive even numbers for the lengths of the Tri. say... Leg1: 2 Leg2: 4 Hypot: 6

well 2squared + 4squared does not equal 6squared. So it seems the equation is not legitimate.

[MiTeach]

the problem doesn't say you can use ANY consecutive even integers! 6, 8 & 10 meet the criteria and satisfy the lengths requirements of a right triangle

[jokerman960]

beast should be a professor at Harvard



[ewfh]

men youre the BEST thanks for the review :D

[ARJU1993]

Are you in MIT?

[raarncgheerr]

great job. I have a question: I got a 720 on the math part and I don't know if I should retake it, does it look worse?

[mchief101]

ur videos are awesome! i have sat this saturday!

and watching ur math vids for quick review THANKS YOU!!!

[gangsterhigh]

how do we know if we had to multiply rather than adding?

[AMbeats]

great videos man... I have that book... and i watched your videooss... thanks. All 6 video also had great lucid explanations.... BOut to watch the rest... What did you get on your SAT"S??