SAT数学Problem Solving练习题(38)

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摘要:下面是小站SAT频道为大家整理了SAT数学Problem Solving练习题(38),供考生们参考,以下是详细内容。

以下是小站SAT频道为大家整理了SAT数学Problem Solving练习题(38),供考生们参考,以下是详细内容。

Question 38: In the figure below, angle AMB is 100o, angle BMD is 40o and angle CME is 60o. What is the value of angle CMD?

Figure not drawn to scale

SAT数学Problem Solving练习题(5)

(a) 20o

(b) 30o

(c) 40o

(d) 50o

(e) 80o

Answer: If angle AMB is 100o, then angle BME is 180o - 100o = 80o

BMC + CMD = 40o

BMC + CMD + DME = 80o

If we subtract the 2 equations, DME = 40o

CMD + DME = 60o

BMC + CMD + DME = 80o

If we subtract the 2 equations, BMC = 20o

CMD = BME - BMC - DME = 80o - 40o - 20o = 20o

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