diep.io
When looking at the diep.io achievements, I saw something that said
Shiny ???
After searching up what it was, you apparently get the achievement by destroying a green square, triangle, or pentagon.
How much health does the square, triangle, and pentagon have?
Not definitive, but as mentioned on the wiki
Interestingly, there is a recurring pattern of colors in the upgrade selection menu and the Class Tree. The first tank will always have a light blue background. The second will be green. The third will be red. The fourth will be yellow. The fifth will be dark blue, and the sixth will be purple (This order can be found in tank's add stats buttons which are color-reversed). Regardless of speculation, colors do not seem to represent anything other than a simple order pattern to more easily discern tanks apart when quickly selecting an upgrade
Note that Tank->Twin is light blue, and adds an forward extra barrel, while Machine Gun->Gunner has a similar effect, but in a different color.
It is interesting that tanks which appear in multiple paths (Twin Flank and Quad Tank) have the same color both times, but they have been placed in the same order to keep the pattern.
Image below for observing the tank pattern.
These are scoreboards:
There are many parts to a scoreboard. The below is a scoreboard from a typical FFA game, but all of these rules apply to Sandbox mode as well.
There are far more than 10 players playing on that FFA server, but the scoreboard only displays the top 10 people. At the top would be the player a savage. with 195.6 thousand points, shown next to their name. They are playing as a Spike, which can be seen at the end of their progress bar.
The progress bar compares the other people on the leaderboard to the top person. {❂} haykam, having 7.5k score, has an about 3.83% filled progress bar. Ninja with 136.2k score has a progress bar filled to about 69.6%.
In Team Deathmatch of both 2 Teams and 4 Teams variants, the background color is not a mint green. Instead, it is the same color as the team the player is on. Otherwise, the rules are the same as FFA/Sandbox.
[MG]SNIPEpro (a Necromancer) is on team red, while necromancer (a Necromancer) and :0 (a Battleship) are on team blue.
In Tag, the scoreboard counts the number of players in each of the 4 teams (on mobile diep.io, there are only 2 teams) with their colors as the background.
In this Tag example, there are 20 players on green, 10 on blue, 5 on red, and 3 on purple.
On Domination, there is no leaderboard.
Best Answer
From diepio.fandom.com/wiki/Polygons
A green pentagon has 1000 HP and gives 13000 XP
A green triangle has 300 HP and gives 2500 XP
A green square has 100 HP and gives 1000 XP
I hope this helps! :)