When I had less than 25 posts on AoPS, I saw many people create threads about them getting 1000th posts. I thought I would never hit 1000 posts, but here we are, this is my 1000th post.

As a lot of users like to do, I'll write my math story:

Daycare
Preschool
Kindergarten
First Grade
Second Grade
Third Grade
Fourth Grade
Fifth Grade
Sixth Grade

In conclusion, AoPS has helped me improve my math. I have also made many new friends on AoPS!

Finally, I would like to say thank you to all the new friends I made and all the instructors on AoPS that taught me!

Minor side note, but

I have trouble getting tangents and most things in the chapter, so some help would be appreciated!

Let be an cyclic quadrilateral with ,, and Find:

Hi people!
I have been and aops user for only a few months and not an active one either, just a user checking other posts and competitions. This is actually my first post. I am in 7th grade and only this year I have actually started locking in on competition math, before that, I didn’t really care about Mathcounts and AMCs. So, I hone my problem-solving skills by lightly doing some math problems. I have signed up for a lot of math competitions this month and am struggling to prepare properly with the resources I have. Do you guys have any resources you use to prepare for math competitions and that are actually helpful to use to prepare for competitions in a short amount of time. I am looking for resources that first teach you stuff and give you problems, like guided notes and handouts. I have few aops books like “Competition Math for Middle School” and “Intermediate Algebra”, but they’re not enough. I have learnt Algebra 1 and started doing high school geometry and a bit of Algebra 2 at home. Do let me know if you have any suggestions!

So I know you can derive Heron's formula with like a bunch of trig identities, as well as using complex numbers and vectors) someone double check me on this).
But I tried deriving it with just pure geometry and nothing else(not like cbashing it or anything), and I got nowhere.
So I was wondering if it even is possible to derive it without trig, cbash, complex numbers, or anything of the sort.

I was wondering what I could use to practice for Mathcount Target rounds because my sprint is normally 23-25+ (Depending on the level: This is for Chapter, but some times for states) but my target is normally 8-10 (Depending on the level: This is normally for states and some time Nats) and I want that to go up to 12-14 So I was wondering what are some good resources to build that problem solving knowledge for target, and some resources that will help me learn the complex problems on there mostly for Geometry and Algebra.

Hi everyone, let me introduce the similar triangles marathon.

Did anyone solve question 8 of target for chapter. The question was find the area of the equilateral triangle with one vertex on (20,25) and the other two on the positive part of the x and y axis. This question was basically impossible in the roughly six minutes you had. nobody at my chapter solved it.

Construct angle 3 degree.

If the perimeter of an isosceles triangle is 36cm and the altitude to its base is 12cm, what is the area, in square centimeters, of the triangle?


this was a countdown round, so do it fast