Question 22
How many isosceles triangles are in the diagram? An isosceles triangle has at least two equal sides.
For this edition, the figure is a 3-column by 2-row grid of equal squares. Every cell except the top-middle cell has both diagonals. Count every isosceles triangle formed by complete drawn segments, including larger triangles. The two source answer keys disagree; use this explicit geometric interpretation.

For this edition, the figure is a 3-column by 2-row grid of equal squares. Every cell except the top-middle cell has both diagonals. Count every isosceles triangle formed by complete drawn segments, including larger triangles. The two source answer keys disagree; use this explicit geometric interpretation.
