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To determine to measure of the unknown angle, be sure to use the total sum of 180°. If two angles are given, add them together and then subtract from 180°. If two angles are the same and unknown, subtract the known angle from 180° and then divide by 2.
The answer is 2010 because 2010 / 10 is 201
I hope!
Answer:
x = 70
Step-by-step explanation:
Ok first let's find the angle where there is an exterior angle:
180-120=60
Then add this and the other inside known angle and subtract that from 180 to get your answer:
60+50=110
180-110=70
It is the first one you see on the top of the page
Step-by-step explanation:
A. 3n = 33
n = 33/ 3 = 11
B. 9 + w = 10
w = 10 - 9 = 1
C. r - 15 = 30
r = 30 + 15 = 45
D. 2y + 3 = 11
2y = 11 - 3
2y = 9
Y = 9/2