下面留学360为大家介绍SAT数学几何学
常用公式
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 CMDFigure 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
Parallel Lines Review
If the 2 horizontal lines are parallel,- angles 1 = 3 = 5 = 7 and- angles 2 = 4 = 6 = 8