The statement that is not true is
B. Perpendicular lines never intersect at right angles.
The definition of perpendicular lines is that they will intersect each other at 90 degree angles.
The answer is 2
also variance just means the squared difference meaning 
15 out of 100 of 360°=15/100×360=54° ans. hope it will help you!
<u><em>Answer:</em></u>3
<u><em>Explanation:</em></u><u>Before we begin, remember the following:</u>

<u>Now, for the given, we have:</u>
3

<u>Applying the above rule, we would get:</u>

Since

cannot be reduced into any other form, therefore, 3√10 would be our final answer.
Hope this helps :)