trianglearithmetic
nounUK /ˈtraɪæŋɡəl əˈrɪθmətɪk/
US /ˈtraɪæŋɡəl əˈrɪθmətɪk/
A kind of math where you add and subtract numbers to fill in the sides of a triangle.
In trianglearithmetic, each side of the triangle must equal the sum of the two numbers below it.
RELATED WORDS
OTHER MEANINGS
2. A puzzle where numbers in a triangle follow a rule of adding neighbors.
She solved the trianglearithmetic puzzle by filling in the missing corner numbers.
3. The study of number patterns arranged in triangular shapes.
The class learned trianglearithmetic by building number triangles with blocks.
4. A method of teaching basic addition using triangle-shaped diagrams.
Teachers use trianglearithmetic to help kids see how numbers fit together.