Scientific American2d
Mathematicians Find Proof to 122-Year-Old Triangle-to-Square Puzzle
Now, more than 122 years after it was first proposed, Kamata and two other mathematicians have finally proved that a solution ...
BBC4y
How do you work out the area of a triangle?
A triangle is always half the area of a rectangle with the same height and width. To calculate the area of a triangle, multiply the height by the width (this is also known as the 'base') then ...
Interesting Engineering on MSN1d
Century-old triangle-to-square dissection puzzle finally solved by mathematicians
Mathematicians struggled to find the fewest number of pieces needed to cut an equilateral triangle and rearrange it into a ...
BBC2y
Finding the length of a side in a right-angled triangle
Trigonometry can be used to find the length of a side in a triangle. Trigonometry close trigonometryThe study of sides and angles in triangles. can be used to find a missing side in a right-angled ...
Scientific American3y
Here’s How to Make Flexagons—Folded Strips of Paper with Strange and Surprising Properties
The last triangle is now folded backward and glued to the other side of the first (D). The figure may be flexed as shown below. It is not meant to be cut out. Fairly stiff paper at least an inch ...