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The gre quatitative section 2

Tham khảo tài liệu 'the gre quatitative section 2', ngoại ngữ, anh ngữ phổ thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | THE GRE QUANTITATIVE SECTION In a square diagonals have both the same length and intersect at 90-degree angles. D C AC DB and AC DB A B Solid Figures Perimeter and Area You will need to know some basic formulas for finding area perimeter and volume on the GRE. It is important that you can recognize the figures by their names and understand when to use which formula. To begin it is necessary to explain five kinds of measurement Perimeter The perimeter of an object is simply the sum of the lengths of all its sides. 6 7 4 10 27 10 195 THE GRE QUANTITATIVE SECTION Area Area is the space inside of the lines defining the shape. Area You will need to know how to find the area of several geometric shapes and figures. The formulas needed for each are listed here To find the area of a triangle use the formula A bh. b To find the area of a circle use the formula A Trr2. To find the area of a parallelogram use the formula A bh. To find the area of a rectangle use the formula A Iw. w l To find the area of a square use the formula A s2 or A 2 d2. 196 THE GRE QUANTITATIVE SECTION To find the area of a trapezoid use the formula A bi b2 h. Volume Volume is a measurement of a three-dimensional object such as a cube or a rectangular solid. An easy way to envision volume is to think about filling an object with water. The volume measures how much water can fit inside. To find the volume of a rectangular solid use the formula V Iwh. height To find the volume of a cube use the formula V e3. e edge .