For this case we have to, by definition:

This means that the tangent of angle B will be equal to the leg opposite the angle on the leg adjacent to the same angle.
Then, clearing to have:

Rounding out the value of a we have:

Answer:
Option C
Answer:
Step-by-step explanation:
84/105 = 4/5
72 you take the number of options available in the first multiplied by the number available in the second multiplied by the number in the third multiplied by the number in the fourth
The only factors that equal 62 are
62 • 1 = 62
and
31 • 2 = 62.
Hope this helps!
Is to long to explain so I'm doing quite
find the triangle side so 2.1 square minus 1.4 square it is equal to 2.45
now you just multiple 2.45 by 2 because if you notice 2.45 is the triangle side that is missing and this is only the half so multiple by 2 for get the X value, I hope this helps you.