MTH 114 Lecture Notes - Lecture 42: Graduate Management Admission Test, Internal And External Angles, Spinning Wheel
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Since a triangle has one area, the area must be the same regardless of the side chosen as the base. The area of an equilateral triangle with a side of length s equals (s^2 x sq root of 3) / 4. Circle - set of points in a plane that are equidistant from a fixed center point. Radius - any line segment that connects two points on a circle. Chord - any line segment that connects two points on a circle. Diameter - any chord that passes through the center of the circle. Gmat tests: circumference, area of whole and partial circles, surface area, volume of cylinders. Pi can usually be approximated as 3 or 22/7; knowing pi is approximately 3 can help rule out small or large answers. A full revolution of a spinning wheel equals the wheel going around once. A point on the edge of a wheel travels one circumference in one revolution.