Whoa whoa whoa. Hold up.
You need to fix your attitude.
Why aren't you smiling on a wonderful day like today, during a pandemic?
I know this is from Intro to Geometry, and if you tell me what week and problem, I can give you a hint.
Alcumus my guy and I am not in Intro to geometry. I am only in intro to algebra B. I am just trying to prepare for AMC 10 so please dont bully me.Proof:
Oh I apologize.
It's nice that you are practicing for it.
I do recall this question from Intro to Geometry but I apologize for not realizing it could have been in alcumus. Give me a second.
OH you have Ruiz???
I had him for Counting and Probability!
Also I am currently self learning the intro to algebra as well :)
Since you know the base angles equal 80, the top angle is 20, so the ABD triangle is isoceles and the top is 20+20 = 40, bottom 70 each.
That means ABD is 70, ADC is 80, so 80-70 = 10?
Im kinda sure that's the answer.
If it's incorrect please let me know.
Thanks Hugo, it was right! Mr.Ruiz is really good. Also, I am try to prepare for AMC 10, since I only got a 97.5 last time. Do you have any reccomendations of what books to buy, I was going to buy Volume 1 but idk if thats the best option. :D
I actually have a bunch of books but don't really use them other than the ones I take.
Intro to Algebra is great, even though I got a 50 something on AMC10 LOL
Intro to Geometry could potentially be useful, and Intro to Count+Prob too.
Volume One might be useful but you could then go to AoPS site and see old tests, since they have great explanations.
Good luck on your next AMC!