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.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

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.
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

Lesson 9 Review

Review of Information Needed to Complete Lesson 9 of Math III Unit 4

What are you finding when you use the following formula: A=1/2 bh? Area of a Triangle
What formula is used to find the area of a rectangle? A = LW (Area equals length times width)
What is the formula for finding the area of a circle? A=pi(r^2) (Area equals pi times the square of the radius)
Define circumference. The circumference of a circle is the distance around the circle.
When do you use the following formula: C=2(pi)r? Circumference of a Circle
Define arc length. The distance along the arc (part of the circumference of a circle, or any curve).
How is arc length calculated? Arc Length = θ × r (when θ is in radians) Arc Length = (θ × π/180) × r (when θ is in degrees)
What is a central angle? A central angle is formed by two radii that start at the center and intersect the circle itself.
When is the Pythagorean Theorem used? The Pythagorean Theorem is used when working with a right triangle.
What is a net? A geometry net is a 2-dimensional shape that can be folded to form a 3-dimensional shape. Also, a net may be defined as a pattern made when the surface of a three-dimensional figure is laid out flat showing each face of the figure.
Created by: Jeanievictory