ä : Alt + 0228. ö : Alt + 0246. ü : Alt + 0252. ß : Alt + 0223. Ä : Alt + 0196. Ö : Alt + 0214. Ü : Alt + 0220.
https://www.restaurantnorman.com/what-does-an-equals-sign-with-a-triangle-above-it-mean/
The Isosceles Triangles have the following properties: Two sides of equal length Two equal angles One line of symmetry
https://www.quora.com/What-is-a-triangle-called-if-all-sides-are-equal-and-all-angles-are-equal
On the advanced view, type Almost Equal. You should now see only the Approximately Equal to sign on the character map dialog. Double click on the symbol to select it. Alternatively, click on the Select button. After you select the symbol, hit on the Copy button to copy.
https://www.myofficetricks.com/how-to-insert-approximately-equal-symbol-in-word/
In the equilateral triangle, all the sides are the same length (congruent) and all the angles are the same size (congruent). Since the sum of the angles of a triangle is always 180 degrees, we can figure out the measure of the angles of an equilateral triangle:
https://www.storyofmathematics.com/types-of-triangles
pdf for "equals sign with triangle on top".(Page 1 of about 18 results)