What is the surface area of this square base pyramid? 3 cm 2 cm 2 cm

16.

Step-by-step explanation:

The formula for a triangle is

So, we take the triangle we see and but in in the formula.

Multiply that by 4, because there are four triangles that size.

Now, we multiply 2 times 2 because that's the surface area for the bottom.

Now, we add the two.

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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