Save
Busy. Please wait.
Log in with Clever
or

Don't have an account?  Sign up
Sign up using Clever
or

taken

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.
Your email address is only used to allow you to reset your password. See 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.
focusNode
Didn't know it?
click below

Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
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

# Geometry - Angles

### Complementary, supplementary, vertical, adjacent, congruent, triangles

TermDefinition
Supplementary Angles Two angles that have a sum of 180º (they add up to 180º)
Complementary Angles Two angles that have a sum of 90º (they add up to 90º)
Vertical Angles Two angles that are opposite and equal, formed when two lines intersect
Adjacent Angles Two angles that share a common vertex and a common ray (two angles that are right next to each other)
Congruent Angles Angles that are equal
Parallel Lines Two lines that never cross
Transversal A line that cuts between two parallel lines
The sum of the angles in a triangle is... 180º
Exterior Angles of a Triangle Angles outside the triangle that make a supplementary pair (180). It is also equal to the sum of the other two interior angles.
What do supplementary angles add up to? 180º
What do complementary angles add up to? 90º
How do you set up an equation to find a missing angle with supplementary angles? Add the two angles together and set it equal to 180º
How do you set up an equation to find a missing angle with complementary angles? Add the two angles together and set it equal to 90º
How do you set up an equation to find a missing angle with vertical angles? Set the two angles equal to each other
How can you tell if two angles are supplementary from a picture? They form a straight line
How can you tell if two angles are complementary rom a picture? They form a right angle (look for the box in the corner)
How can you tell if two angles are vertical from a picture? They are opposite each other
How do you set up an equation to find the missing angle of a triangle? Add all three angles together and set it equal to 180º
Created by: HStout

Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

• SPACEBAR - flip the current card
• LEFT ARROW - move card to the Don't know pile
• RIGHT ARROW - move card to Know pile
• BACKSPACE - undo the previous action

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
 "Know" box contains: Time elapsed: Retries:
restart all cards