If you've finished this game and need more of a challenge try the different versions of this game below:
Use the coordinate pairs on each button to calculate the slope of the line they are on. Choose the button that matches the number in a barrel and shoot the barrel to destroy it. Be careful calculating the slope and aiming as there is limited ammo. There are 25 levels for you to complete without any time limit. The beginner version has all positive slopes and the starting coordinate pair is the origin (0,0).
To shoot the cannon, you'll need to load it with a "coordinate pair slope shot" and then hold down the left mouse button or your finger to aim and set power. Release to fire the cannon. There's also a video available via the Video icon on the main menu that shows solutions to all of the levels in case you get stuck.
Below Are More MathNook Geometry Games