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Learn how to find the square root of perfect squares like 25, 36, and 81.
Let's start by taking a look at an example evaluating the square root of $\greenD{25}$:
$\large \sqrt{\greenD{25}} = \,?$
Step 1: Ask, "What number squared equals $\greenD{25}$?"
Step 2: Notice that $\blueD5$ squared equals $\greenD{25}$.
$\large \blueD5^2= \blueD5 \times \blueD5 = \greenD{25}$
$\large \sqrt{\greenD{25}} = \blueD5$
Here's a question to make sure you understood:

Connection to a square

Finding the square root of $\greenD{25}$ is the same as finding the side length of a square with an area of $\greenD{25}$.
A square with an area of $\greenD{25}$ has a side length of $\blueD{5}$.