Math A
Terms
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- Distributive Property
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You can multiply a number by the sum of two other numbers or multiply the number by each and then add:
5(2 + 3) = 5(2) + 5(3) - Inverse Property of Addition
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You can add the opposite of a number and get zero (to cancel):
4 + -4 = 0 - Inverse Property of Multiplication
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You can multiply by the reciprocal of a number and get one (to cancel):
3/4 x 4/3 = 1 - Commutative Property
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You can change the order in which you add or multiply two numbers and get the same answer:
3 + 5 = 5 + 3
7 x 8 = 8 x 7 - Associative Property
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You can group numbers differently when adding or multiplying and get the same answer:
6 + (7 + 9) = (6 + 7) + 9
3 x (4 x 5) = (3 x 4) x 5 - Identity Property of Addition
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You can add zero to a number and keep it the same:
6 + 0 = 6 - Identity Property of Multiplication
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You can multiply a number by one and keep it the same:
4 x 1 = 4 - Area of a Triangle
- A = 1/2 bh
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Area of a Parallelogram
(including rectangles, squares, rhombi) - A = bh
- Area of a Trapezoid
- A = 1/2 h (b1 + b2)
- Volume of a rectangular solid (box)
- V = lwh
- Surface Area of a rectangular solid (box)
- SA = 2lw + 2wh + 2lh
- Area of a Circle
- A = pi x r x r
- Circumference of a Circle
- C = pi x d
- Volume of a cylinder (can)
- V = pi x r x r x h
- Surface Area of a cylinder (can)
- SA = 2pi x r x h + 2pi x r x r
- Sin A
- opposite/hypotenuse
- Cos A
- adjacent/hypotenuse
- Tan A
- opposite/adjacent
- Pythagorean Theorem
- axa + bxb = cxc