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23 Dec 2024, 11:55
Kudos
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
85% (00:33) correct
14% (02:26) wrong based on 7 sessions
History
Date
Time
Result
Not Attempted Yet
In the figure below, what is the value of a + b + c?
A. 210
B. 220
C. 240
D. 270
E. 280
1.jpg [ 9.18 KiB | Viewed 661 times ]
A. 210
B. 220
C. 240
D. 270
E. 280
Attachment:
1.jpg [ 9.18 KiB | Viewed 661 times ]
25 Dec 2024, 11:11
Kudos
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OE
The unmarked angle opposite the 60° angle also measures 60°, and the sum of the measures of all six angles in the diagram is 360°. So,
\(360= a+b+c+20+60+60\)
\(=a+b+c+140\)
Subtracting 140 from each side, we get that a + b + c = 220.
The unmarked angle opposite the 60° angle also measures 60°, and the sum of the measures of all six angles in the diagram is 360°. So,
\(360= a+b+c+20+60+60\)
\(=a+b+c+140\)
Subtracting 140 from each side, we get that a + b + c = 220.
