Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how


Math Formulas

Perimeter of a Rectangle P = 2l + 2w or P = 2(l + w)
Perimeter of a Polygon Sum of all sides
Circumference of a Circle C = 2πr or C = πd
Area of a Triangle A = 1/2bh or A = bh/2
Area of a Circle A = πr to the 2nd power
Area of a Square A = s to the 2nd power
Area of a Rectangle A = lw or A = bh
Area of Parallelogram Base x height
Area of a Trapezoid A = 1/2(a+b)h
Volume of a cylinder V = πr to the 2nd power times h
Surface Area of a Cylinder S = 2πrh + 2πr to the 2nd power or S = 2πr(h + r)
Volume of a rectangular prism V = (L)(W)(H)
Surface Area of a Rectangular Prism 2(LW + LH + WH)
Percent Change Difference divided by Decimal (difference/original $ = percent change)
Simple Interest Interest = percent x rate x time I= ($) x (%) x (years)
Ratio for probability Desire divided by total
Rational Numbers numbers that can be written as a ratio or fraction ("all frats are rats")
Irrational Numbers Cannot be written as a ratio or a fraction (no bar, no pattern) Example: π - Pi
Scientific Notation a way to easily handle very large numbers or very small numbers (ex: 0.0000000056 = 5.6 x 10 to the -9 power)
Midpoint Value x1 + x2/2, y1 + y2/2 (subscript↓)
Complementary Angles either of two angles whose sum is 90 degrees
Supplementary Angles either of 2 angles whose sum is 180 degrees
Translation slide
rotation turn
dilation multiply/enlarge/shrink
reflection flip
distance/rate formula d = r x t
distance between two points d=√(x2-x1)2 + (y2-y1)2 (subscript↓)
unit cost total cost/# of items or money/number
Slope intercept form y=mx + b
slope formula rise/run or y2-y1/x2-x1 (subscript↓)
Triangle sum theorum a + b + c = 180
Exterior angle theorum angle A = the sum of 2 remote interior angles of a triangle
Pythagorean Theorum a2 + b2 = c2 (superscript↑)
Volume of a cube v = s3 (superscript) or V = L x W x H
Volume of a cone v = 1/3πr2h (superscript↑)
volume of a sphere v = 4/3πr3 (superscript↑)
volume of a pyramid v = lwh/3
surface area of a cube 6s squared
surface area of a cone a = πr squared + πrL
surface area of a sphere a = 4πr squared
Created by: ndmsteach