SAT II Math Geometry

Geometry

The following formulas and relatiomships are important in solving geometry problems.

Angle Relationships

1. The base angles of an isosceles triangle are equal.
2. The sum of the measures of the interior angles of any n-sided polygon is 180(n-2) degrees.
3. The sum of the measures of the exterior angles of any n-sided polygon is 360 degrees
4. If two parallel lines are cut by a transversal ,the alternate interior angles are equal, and the

Right Triangle Relationships

1. If an altitude is drawn is drawn to the hypotenuse of a right triangle, It is the mean proportional between the segments of the hypotenuse, and either leg is the mean proportional between the hypotenuse and the segments adjaccent to that leg.
2. In a right triangle, the square of the hypotenuse is equal to the sum of squares of the leg. (Remember the Pythagorean trples : 3,4,5;5,12,13.)
3. In a 30 degrees - 60 degrees right triangle , the leg opposite the 30 degrees angle is one-half the hypotenuse , and the leg opposite the 60 degrees angle is one-half the hypotenuse time square root 3
4. In a right isosceles triangle the hypotenuseis equal to either leg times square root 2
5. In a equilateral triangle of side s , the altitude equals 8/2 square root 3

โจทย์ SAT II Math เรื่อง Law of Sines - Law of Cosines

โจทย์ SAT II Math เรื่อง Deegree and Radian Measure และเรื่อง Trigonometric Identities

การสอบ SAT สำหรับนักเรียน Inter

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