Answer:
500
Step-by-step explanation:
Assuming the sum of the opposite angle would be 180. We can easily calculate for x and ultimately solve for the angle of B. We do as follows
B + D = 180
3x-12 + x = 180
4x - 12 = 180
4x = 192
x = 48 degrees
Therefore angle B would have a measurement of 132 degrees. Hope this helps.
The angle of pi over 2 radians is 90 degrees.
The answer is 6 u can solve this using the Pythagorean theorem here’s a link to it https://www.wikihow.com/Use-the-Pythagorean-Theorem