Step-by-step explanation:
1st one
2nd
4th
Answer:
= 
Step-by-step explanation:
<u><em>Explanation:-</em></u>
Given that

= 
= 
= 
= 
Answer:
4
Step-by-step explanation:
4 because 4^2 = 16.
Answer:
45º
Step-by-step explanation:
Since we know the relatiionship of a 45-45-90 degree triangle, we can go two ways. Either we can use this to find CA and get the tangent of (6/6) or we can go straight to it. The hypotenuse in a 45-45-90 is always 6√2 and we know it is a right triangle so we can confirm this. So, measure of angle B is 45º.
True
______
A closed circuit basically means everything is connected by wires and for this setup every device receives electricity making this true