mathematics - Five Angles in a Star - Puzzling Stack Exchange
2015年7月10日 · This is an image of an arrow sweeping each of the successive angles in the star. Notice that, after it traces all $5$ angles, its orientation is reversed - meaning it has rotated …
pattern - angles of a star - Puzzling Stack Exchange
I want to make a star with 2" x 2". I know that there are 10 equal length sides. What I need to know is what angle am I to cut each piece at: the tip of the star, and the outside "V" of the star. …
(addition) 7 point star / heptagram - Puzzling Stack Exchange
2016年10月3日 · Five Angles in a Star. 8. Arrange numbers to the triangles, so the sums are equal to S. 4. The Perfect ...
A geometric puzzle. What is the angle? - Puzzling Stack Exchange
2021年3月31日 · First, by tracing angles we can identify a couple of isosceles triangles, highlighted in colour: M is the midpoint of AB Angles: <ABD = <BAC = 20° <ADX = <BDX = …
mathematics - Find shortest network connecting four points
The lines from the bottom and leftmost points of the 4-sided star follow a little inside the edges of the purple region, the section between P and Q kinks a little as it just touches the top and …
Does anybody know the history of this star/triangle puzzle?
2020年12月23日 · Find 10 triangles in a five pointed star using two straight lines. 22. Five Angles in a Star. 29. Plant 9 ...
A theorem about angles in the form of arctan(1/n)
2020年12月8日 · Now, we consider a general problem involving angles in the form of arctan(1/n), which is the smallest angle formed by a right triangle of height 1 and width n (an integer). For …
Find 10 triangles in a five pointed star using two straight lines
$\begingroup$ So you have the star (with 5 triangles) and you need to add 2 lines in a way that there will be exactly 10 triangles? $\endgroup$ – klm123 Commented Sep 22, 2014 at 17:20
mathematics - Quadrilateral with sides, diagonals and area that are ...
2019年9月17日 · I ran a computer search, which confirms Conifers' answer. The program simply tries all values for the sides and the diagonals. I do not assume the sides are in any particular …
Wood puzzle of 6 equal parts - Puzzling Stack Exchange
2020年4月23日 · I happen to have a very small plastic version of this puzzle. It contains 6 trapezoidal pieces. 1 plain bar ; 3 notched bars