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01 Sep 2017, 00:46
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C
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Difficulty:
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98% (00:21) correct
2%
(00:02)
wrong
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If RS = ST = TR in the figure above, what is the value of x?
(A) 60
(B) 90
(C) 120
(D) 135
(E) 180
Attachment:
2017-09-01_1134_002.png [ 6.34 KiB | Viewed 3708 times ]
sanah23
Joined: 29 Jul 2017
Last visit: 24 Dec 2020
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Location: India
Concentration: Entrepreneurship, Nonprofit
Schools: IE '22 (A) Ross '22 (WL) Johnson '22 (WL) IESE'23 (A$) ESADE '23 (A) HEC Sept'22 Intake (I)
GRE 1: Q164 V158
Schools: IE '22 (A) Ross '22 (WL) Johnson '22 (WL) IESE'23 (A$) ESADE '23 (A) HEC Sept'22 Intake (I)
GRE 1: Q164 V158
Posts: 6
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IMO, answer is C.
The information given indicates that RST is an equilateral triangle making \(x^{\circ} = 180^{\circ} - {\angle}SRT = 180^{\circ}-60^{\circ} = 120^{\circ}\)
The information given indicates that RST is an equilateral triangle making \(x^{\circ} = 180^{\circ} - {\angle}SRT = 180^{\circ}-60^{\circ} = 120^{\circ}\)
01 Sep 2017, 03:41
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The triangle is equilateral. Hence, all angles are 60 degrees. Since angle x is created by merely extending RT, we can conclude that the measure of x is 180-60 = 120 degrees
