Area is how many unit squares can fit in a figure. For example, if you imagine a grid with many squares, one square would be 1 square unit. Two squares would be 2 square units. If you have a rectangle with 27 squares that would be 27 square units. But it would be really hard and time-consuming to count all 27 of those squares. So you can use a formula. Length * width = area Length of 9 times width of 3 = 27 square units.
Now different shapes/figures have different formulas for area. In a triangle, the formula is (1/2)*base*height, or (base*height)/2. This is because a triangle is half of a rectangle, so you multiply the base and height and divide all that by 2.
The best correct answer is option E. If two or more polygons are congruent, then rigid transformations can be used to map one polygon onto the other. <span>Two figures are said to be congruent when they have the same shape and
size or if one object is a mirror image of the other object.</span>
