Step 1. Since 8 x 8 = 64, The square root of 64 is 8.

Step 2. Take the square root of both sides.

<span>
Step 3. </span>Simplify

to


Step 4. Simplify square root
Given:
In triangle OPQ, o = 700 cm, p = 840 cm and q=620 cm.
To find:
The measure of angle P.
Solution:
According to the Law of Cosines:

Using Law of Cosines in triangle OPQ, we get




On further simplification, we get




Therefore, the measure of angle P is 79 degrees.
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