took the SAT a few months back and got a really disappointing score on the math purely because I had forgotten all of the middle school triangle stuff (all of the angle and side congruency rules). I did amazing on everything else. taking it again in a few days and that's definitely not happening again!
This has been the MOST helpful geometry video I’ve seen for the SAT. I am 100% honest when I say that before this video I could not solve the highest difficulty geometry problems, but now that I understand the concepts it’s so easy
@empoweredsuccess it doesn't matter that he used sin(c) because sine C and sine F are both equivalent angles. if you solve using the sides from triangle DEF you will notice you get the same answer as if you solve using ABC.
actually no it doesn't have the same answer , and they are not equal to each other cuz it literally says that DEF is 1/3 of ABC triangle , no hate tho hope that helps
@@sheruutariq sin C and sin F are still the same value because we know the triangles are similar, therefore the ratios of the corresponding lengths are equal, no hate tho hope that helps
For number 18, just from looking at 6 and 18, the triangle ECA is 3x bigger than DCB. So you could've just did 8*3= 24, which means C to A has a length of 24. Now you just do the pythagorem theorem. 24 squared + 18 squared = x squared. 24 squared + 18 squared = 900. squared root of 900 = 30 very easy.
I just passed my international dsat, literally like an hour ago and I got the almost same question like in 2:46 but the thing is, the 114 one was an X and the X one in video was 28, 31->43 and I couldn’t solve for X, still sitting with this one even after my exam is over(
for the qn 20th, i solved by a diff way for which i got my ans in decimal i.e 0.66 which is 3/5 (the ans u got was 3/5) so wht i wanna ask is if answers in decimals are allowed?
Well, he just assumed that you can take it as 40-40 or 50-50. Anything is fine. He just assumed it .he just wanted to tell you that sin and cos of an angle are to equal
It doesn't matter what he put, it could've been 80-80 or 25-25 or anything else. He's just saying that apparently when you are taking sin of an angle, cosine of the angle next to it is the same thing. Kind of confused me to
no its right AE which is 18 refers to the entire triangle ACE therefore you dont have to add 10 so 30 is correct. If you are confused or dont believe me there are other videos that do this problem ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-wXMQlY853A0.html
