This is a low-prep math workshop station or math center for individual or partner work.
Students roll dice (you can use 6-sided dice or decahedra) to create the dimensions of rectangles and right triangles. Students determine the area of each shape. Because students use the same numbers to create the rectangles and right triangles, this activity reinforces the step of dividing by 2 to find the area of a right triangle.
A reflection question gives students an opportunity to talk and write about their thinking in the end.