What number goes in the circle?
Scroll down for the answer.
A little more.
We know that a square is equal to three triangles. Therefore, we can substitute three triangles for the square on the left of the image. Therefore 5 triangles is equal to 90 and 1 triangle must be equal to 18. Since a square is equal to 3 triangles, a square has a value of 18 X 3 = 54. Thus, a circle is equal to 18 (one triangle) + 54 (one square), or 72.
