Group Activity Cards

 Geometry Use groups of 3. Materials: Index cards, spinners, grid paper, colored pencils Triangle Demolition Derby

Copy onto cards the vertices of triangles shown below. Shuffle the cards and place them face down in a pile. Label equal sections of two spinners "-4," "-3," "-2," "-1," "1," "2," "3," "4." Decide which spinner names x-coordinates and which spinner names y-coordinates.

Each group member selects a card from the pile and graphs the triangle described on the same coordinate plane using a different colored pencil. Then, in turn, each group member spins both spinners and uses the resulting ordered pair to translate his or her original figure. (The x-coordinate of the ordered pair tells how many units left (-) or right (+) to move each x-coordinate of the vertices. The y-coordinate of the ordered pair tells how many units down (-) or up (+) to move each y-coordinate of the vertices.) If your translation touches or overlaps with another group member 's translation, award yourself 1 point.

Repeat the procedure several times, reshuffling the cards when necessary. The group member with the most points wins.

Vertices to put on cards:

Indiana