Problems from Calculation of apothems and edges of a pyramid

Development:

From the formula introduced in the section "calculation of the edge of a pyramid", we know that $10$ cm is the height, therefore, $h=10$ and the radius of the base is $5$ cm, consequently, $r=5$.

Applying the given formula we have:

$$a=\sqrt{h^2+r^2}=\sqrt{{10}^2+5^2}=5\sqrt{5}$$

Solution:

The side edge of the pyramid is $5\sqrt{5}$ cm.

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