Question
A unit shape in the form of a right-angled triangle is drawn in the grid. Cindy forms a rectangle by joining two unit shapes as shown. In addition to the rectangle, Cindy wants to form  a rhombus. This figure is to be formed with the smallest number of unit shapes. How many triangles are required to construct the smallest rhombus?
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A unit shape in the form of a right-angled triangle is drawn in the grid. Cindy forms a rectangle by joining two unit shapes as shown. In addition to the rectangle, Cindy wants to form  a rhombus. This figure is to be formed with the smallest number of unit shapes. How many triangles are required to construct the smallest rhombus?