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Gravity
Terms in this set (21)
Unit Conversions
Be sure to convert units of measurement so that they're consistent. If a question asks how many 3-x-6-inch bricks it will take to cover a 6-x-6-foot patio, be sure to recognize that inches and feet are two different measurements and perform the necessary conversions.
1 ft. = 12 in
1 yd = 3 ft
1 mi = 5280 ft
1 lb = 16 oz
1 ton = 2000 lbs
1 gal = 4 quarts
1 qt = 2 pts
1 pt = 4 cups
Perimeter
The distance around a figure. Find the sum of all of the sides.
Area of a rectangle (l=length, w=width)
a = lw
Pythagorean theorem
a²+b²=c²
where c equals the length of a right triangle's hypotenuse, and a and b equal the lengths of the remaining two legs of the right triangle
Volume of a cube: v = s3, where s = the length of one side of the cube
Volume of a rectangular box: v = lwh, where l = the length, w = the width, and h = the height of the box
Volume of a cylinder: v = Πr2h, where r = the radius of the cylinder and h = the height of the cylinder
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Surface area of a cube: SA = 6s2
Surface area of a rectangular box: SA =2lw + 2wh + 2lh
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Order of Operations
The order in which operations in an expression to be evaluated are carried out. 1. Parentheses 2. Exponents 3. Multiplication and Divison 4. Addition and Subtraction.
Area of a triangle (b=base, h=height)
a =1/2 (b*h)
Circles
Radius: The distance from the center of a circle to any point on its perimeter.
Diameter: Twice the radius. The distance straight from one point on the perimeter, passing through the center, meeting the perimeter on the other side.
Circles
Circumference: the distance around the circle
C=2πr
Area; the space inside the circle
A=πr²
Remember: π = 3.14
Fractions
To add or subtract, find a common denominator
Exponents
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Inequalities
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Interest
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Numbers
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Patterns & Sequences
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Scientific Notation
A mathematical method of writing numbers using powers of ten.
Arithmetic Mean
The average of a list of values
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Fractions
To multiple, multiply straight across
Angle sum of triangle
the sum of all three angles in any triangle will equal 180 degrees
Angle sum of quadrilateral
the sum of all four interior angles of any quadrilateral will equal 360 degrees
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