So this triangle is considered a "special triangle". The 30-60-90 triangle rule states that if the short leg is n, then the hypotenuse is 2n and the long leg is n√3.
In this case, since the short leg is 7, x = 14 and y = 7√3. The correct answer that has this is B.
A circle with a circumference of 361/pi has a diameter of 114.91
Diameter = 114.91
Since they are adjacent complementary angles, that means angle TUV and angle VUW add to equal 90°. Since angle TUV is 80°, you subtract 80 from 90, which gives you 10°. So, this means angle VUW is 10°.
