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congruency means that two figures or items are exactly the same size and shape. where in life would it be vitally important for two or more items to be congruent?

explain a well explain answer!

In a store, perhaps. People want it to be easy to shop, so it would be best for say, a top ramen package to be the same net weight as all the other top ramen packages. This makes it 1) easy to label and 2) easy to be confident buying, as it is exactly the same as all the others.