Alexis' Pre-Algebra- Angles, Unit Price, Tax, Interest, PEMDAS, 6 types of #s
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each of the black spaces below before clicking
on it to display the answer.
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| GEOMETRIC RELATIONS... | ********************************************************************
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| an angle | rhw measure of the space between 2 rays that meet. Angles are measured in degreese.
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| an acute angle | measured less than 90°.
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| a right angle | measures exactly 90°. We use a box to show the right angle in it.
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| an obtuse angle | measures more than 90° but less than 180°.
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| a straight angle | meansures 180° or exactly a half circle.
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| a reflex angle | measures more than 180° but less than 360° (1/2 - full circle).
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| Rays | sides of the angels.
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| Vertex | the meeting point of the rays.
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| Complementary angels | 2 angels whose measures add up to 90°.
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| Supplementary angels | 2 angels whose measures add up to 180°.
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| Adjacent angels | 2 angels that share a ray.
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| Linear Pair | 2 angels that are suplementary AND adjacent.
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| Vertical angels | Angles opposite of one another when 2 lines intercect. They are congruent.
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| Congruent | Having the same shape and size.
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| *SHAPES...* | ********************************************************************
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| Obtuse triangle | A triangle with 1 obtuse angle.
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| Equilateral triangle | Has 3 congruent sides.
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| Isosceles triangle | has 2 equal sides
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| *SIDES OF A RIGHT TRIANGLE...* | ********************************************************************
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| Legs | Sides that make up the right angle.
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| Hypotenuse | The side across from the right angle. *Always the longest side of a right triangle.
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| *(something important...* | ********************************************************************
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| Ratio | A comparison between two values. (ex: with 3 boys and 9 girls: 1:3)
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| Proportion | (blank)
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| Unit Price | (blank)
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| Percent | (blank)
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| *SALESTAX...* | ********************************************************************
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| What is it? | Money you pay on an item you purchase (sales tax rate: % of tax).
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| Where does it go? | Stave gov: roads, schools.
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| What is taxed? | Prepared food (restaurant), CDs, DVDs, candy.
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| What is NOT taxed? | Food, clothing.
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| Tax Formula | tax amount/ticket price= tax rate/100
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| Interest | Money charged/paid for the use of money.
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| Principal | Original ammount borrowed/deposited.
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| Rate | Percent of the interest (writen as a decimal).
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| Time | Amount in time (in years) that the money is borrowed/saved.
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| *INTEREST...* | ********************************************************************
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| Interest | Money charged/paid for the use of money.
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| Principal | Original ammount borrowed/deposited.
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| Rate | Percent of the interest (writen as a decimal).
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| Time | Amount in time (in years) that the money is borrowed/saved.
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| Formula | I=p•r•t
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| *PEMDAS...* | ********************************************************************
(order to solve a problem based on the sings.)
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| P | Parenthesis
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| E | Exponentials (power of #)
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| MD | Multiplication/Division
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| AS | Addition/Subtraction
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| Numonic way to remember: | Please Excuse My Dear Aunt Sally
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| *NUMBERS...* | ********************************************************************
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| Natural numbers | Counting numbers seen in nature. (N)
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| Whole numbers | Natural numbers + 0 (that's it!). (W)
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| Intergers | Whole numbers plus their opposites. (Z)
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| Rational numbers | All combinations of fractions (positive & negative). (Q)
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| Irrational numbers | Any non terminating, non repeating decimal. (O with line on top)
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| Real numbers | Every single number.
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| *TERMS...* | ********************************************************************
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| Term | Number, variable, or product of numbers and variables (terms
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| Numerical Term | A term with only numbers
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| Variable Term | A term with at least one variable (ex: 5x, -2x, 3xy, xy)
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| Combining Like Terms | Focus on the coefficients (the number in the terms). Follow the interger rules to combine them. 2) Then just add them.
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| (continued...) | An expression is simplified when all its like terms are combined, and there are no parenthesis left.
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Created by:
Alexis9009
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