I saw it ONCE on a Wikipedia article which I can’t find anymore, I saw this hollow knight shaped geometric (?) shape on a Cartesian grid and I don’t know know the name and I can’t find it anywhere. If you have any idea on what I’m talking about I’ll be glad to receive useful comments

sorry if this is not the name in english, but there's no place i can ask about geometry in my mother tongue;

i haven't been able to attend any geometry classes this semester yet, and it seems i have a test next week, where i don't even know how to represent the points; i have this basic first exercise that my teacher sent but i cant find a single video where they use actual coordinates to find anything, i need help with this asap please, and i dont mean doing this whole exercise for me, i really just need help figuring out how to put the points on the paper so i can do the rest (LT means ground line and LH means horizontal line, so the viewers height line) thanks in advance, i hope this isnt breaking the rules, i just cant find anything that shows me how to do this

1. Sheet A, bottom. LT centered on the sheet. Viewing height 001 = 6 and viewing distance OO2 = 8

Using the Direct Method, determine the perspective of the following points, each given by its 3 coordinates, and also the perspective of their horizontal projections:

A(3;2;4), B(10;-4;2), C(-5;-10;-3), D(-8;1;6),

E(12;8;3), F(-10;14;4), H(2;-5;0) e V(-6;0;7)

I'm referring to how the hypotenuse and vertical line drawn from the base continue past the corner. Also, isn't 53 degrees wrong for that angle- inside the triangle, or outside? Thanks for the help. And If its not obvious by now I'm no math wiz.

i recently came across a question which said there are 16 lines 7 of which are parallel when our teacher started explaining it he explained that if 7 out of those 16 are parallel lines then the remaining 9 would be non parallel. but the problem is i think the sum of non parallel lines and parallel lines adds up to 17.
lets say there are 9 lines non parallel to each other and as you draw line number 10 then at that point there are 10 non parallel lines and when u draw the remaining 6 lines parallel to the 10th line there are 7 parallel lines and 10 non parallel lines and the sum adds up to 17.
Case 2:
u drew 9 line non parallel to each other and to avoid the problem in the first case u drew a line parallel to the 9th line at that point there are 2 parallel lines and when u draw the remaining 6 lines there will be 8 parallel lines and 9 non parallel lines
pls help me understand im confused what am i thinking wrong😭.

IM BAAAAAAAAAAAAAAAAAAACK

https://www.desmos.com/geometry/rslyf3vhdn

Plato wasn’t a Platonist, he was a Pythagorean.

The triangle is a Pythagorean triplet with side lengths 3, 4, and 5.

The corresponding incircle and excircles have radii 1, 2, 3, and 6. Completing the sequence 123456.

The circles represent the four virtues, the largest representing justice.

When wisdom, courage, and moderation are in harmony justice is achieved, that’s why all three circles can fit inside the largest.

GGS

Hi all,
I am assuming that all the circles have same radius. I figured the coordinates where the center of each circle will be. Please help me figure out the radius of the circle based on information below:

1) The bottom circle’s midpoint is 30mm from the red dash line (x coordinate)
2) The bottom circles midpoint is 30mm from the solid black line at the bottom and is the y coordinate.
3) it seems the radius is 20mm the midpoint of the 40mm

Am I off? Thank you?

ABC is a semi circle

EFCG is a rectangle

Find area of rectangle