Similar polygons have the same shape, but not necessarily the same size. Are rectangles with dimensions 8 x 5 and 25 x 40 similar?

What is the perimeter of a trapezoid made out of 100 unit-trapezoids?

In this sequence of similar, growing "V" figures, each V is constructed out of some number of identical small, square tiles.

What is the **perimeter** of the next, similar V-figure in this sequence, which would be made out of 48 square tiles?

Hint: Can you use the ratio of scale between the yellow and green trapezoids to calculate the area of the green trapezoid quickly?...

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