Home > Shapes > Geometry
It has become obvious that the Shapes category was in way over its head with all sorts of geometrical problems. So, the hard-core Geometry problems will now reside here, where they will fit in much better.
You are given a regular decagon A1 A2 ... A10 . Let A be the intersection point of lines A1 A4 and A2 A5 , B is the point of intersection of lines A1 A6 and A2 A7 , and C is the point of intersection of lines A1 A9 and A2 A10 . Find the angle of ABC.
Page 6 of 46
<< prev
Page 1
Page 2
Page 3
Page 4
Page 5
Page 6
Page 7
Page 8
Page 9
Page 10
Page 11
Page 12
Page 13
Page 14
Page 15
Page 16
Page 17
Page 18
Page 19
Page 20
Page 21
Page 22
Page 23
Page 24
Page 25
Page 26
Page 27
Page 28
Page 29
Page 30
Page 31
Page 32
Page 33
Page 34
Page 35
Page 36
Page 37
Page 38
Page 39
Page 40
Page 41
Page 42
Page 43
Page 44
Page 45
Page 46
next >>
Square and triangle in a circle |
Rating: 2.00 Posted on 2020-04-13 by Jer (No Solution Yet, 5 Comments) hexagons inside hexagon |
Rating: 1.00 Posted on 2020-04-03 by Danish Ahmed Khan (No Solution Yet, 1 Comments) Tan2Mid |
Posted on 2020-03-11 by Bractals (Solution Posted, 1 Comments) 3 equilateral triangles in a rectangle |
Posted on 2020-02-28 by Jer (Solution Posted, 2 Comments) Pythagorean Reciprocals |
Rating: 2.00 Posted on 2020-02-05 by Brian Smith (No Solution Yet, 14 Comments) 3 circles in an isosceles trapezoid |
Posted on 2020-01-10 by Jer (No Solution Yet, 3 Comments) Equal angles within a right triangle |
Posted on 2020-01-08 by Jer (No Solution Yet, 2 Comments) Reflection coincides with the center |
Rating: 3.50 Posted on 2019-12-06 by Danish Ahmed Khan (No Solution Yet, 18 Comments) Hexagonal interior point |
Posted on 2019-09-24 by Danish Ahmed Khan (No Solution Yet, 6 Comments) Is it an Ellipse? |
Posted on 2019-09-20 by Danish Ahmed Khan (No Solution Yet, 1 Comments) 5 circles in a square part 2 |
Posted on 2019-09-08 by Jer (No Solution Yet, 2 Comments) Don't assume you know this concave pentagon |
Rating: 5.00 Posted on 2019-09-01 by Brian Smith (No Solution Yet, 15 Comments) Parabola Axis Construction |
Posted on 2019-08-31 by Danish Ahmed Khan (No Solution Yet, 2 Comments) 5 circles in a square part 1 |
Posted on 2019-08-28 by Jer (No Solution Yet, 6 Comments) Talwalker trouble |
Posted on 2019-08-24 by broll (No Solution Yet, 3 Comments)
Please log in:
Forums (2)
Newest Problems
Random Problem
FAQ |
About This Site
Site Statistics
New Comments (4)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On
Chatterbox: