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SAT考試幾何部分常用公式.

2017/08/06 05:34:38 編輯： 瀏覽次數(shù)：241 移動(dòng)端

Angles Review

Angle CMB = Angle AMD Angle AMD + Angle CMA = 180o

Example of SAT question with angles: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 (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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