Answer:
Question 8: a. 58 degrees.
b. 137 degrees
c. 137 degrees
e. 223 degrees
f. 238 degrees
Question 9: 21 and 1/3
Question 10: 117 degrees
Question 11: a. 4.87 units
b. 43.04 units
Step-by-step explanation:
All you really need to know is that a circle has 360 degrees and that a straight line has a measure of 180 degrees. You were given enough info on all of Question 8 so all you needed to do was subtract a few pre-existing measures from 180 or 360. For questions 9 and 10, you just needed to add up the angles with x in it and find what it equals to. For example, in question 9, you know a circle is 360 degrees. You were already given 2 measures, 26 and 143 which add up to 169. You then subtract 169 from 360 to find the remaining angle measures. 360-169=191. Since you know the remaining angles add up to 191 you can add 7x-6 and 2x+5. 9x-1=191 Solve for x. x=21.3333.
You are given the formula for question 11 so all you need to do is find the angle measure. You already know how to do that from the previous practice problems. You then plug in the angle measure for x and solve. You should use a calculator to find the decimal answer, but if you need it in exact form, just leave it in pi. Hopefully, you tried some of these on your own because this is good practice for angles.
(Also this was a ton of work so Brainliest would be appreciated!)
