Angles Review
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Angle CMB = Angle AMD |
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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
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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
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If the 2 horizontal lines are parallel, |
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Polygons Review
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The sum of the measures of the interior angles of a triangle is 180°. |
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The sum of the measures of the interior angles of a polygon is: |
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The sum of the measures of the interior angles of the polygon above is (5 - 2)·180o = 540o
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AC2 = AB2 + BC2. |
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Pythagorean Theorem applied to the triangle above: AC2 = AB2 + BC2.
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Equilateral triangle. |
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Isosceles triangle. |
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a> c > b. |
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In any triangle, the longest side is opposite the largest angle, and the shortest side is opposite the smallest angle.
Area, Perimeter and Volume
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Rectangle Perimeter Rectangle Area |
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Triangle Perimeter Triangle Area |
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Circle Perimeter Circle Area |
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Cube Volume |
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Cylinder Volume |
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