Practice with Rotations

Tic-Tac-Toe Questions

Practice with Rotations

• Divide the class into two teams, named “X” and “O”.

• Draw a large tic-tac-toe grid on the board.• Take turns asking questions of each team. The

answer must include an explanation.– If answered correctly, they

may place their symbol on

the game board.– If answered incorrectly, the

other team may place their

symbol on the game board.

• The first team with 3 symbols

in a row wins the game.

Question 1

• TRUE or FALSE?• This pinwheel is spinning in a counterclockwise

direction.

• WHY?

Question 1

• FALSE• This pinwheel is spinning in a counterclockwise

direction.

• WHY? The pinwheel is spinning in the same direction as the hands of a clock.

Question 2

• TRUE or FALSE?• The number of degrees separating the center

lines of the blades on this fan is 60°.

• WHY?

Question 2

• FALSE• The number of degrees separating the center

lines of the blades on this fan is 60°.

• WHY? There are four blades on the fan. Divide 360° by 4. The blades are 90° apart.

Question 3

• TRUE or FALSE?• This drawing has been rotated 180°.

• WHY?

Question 3

• FALSE• This drawing has been rotated 180°.

• WHY? The rotation is 90°.

Question 4

• TRUE or FALSE?• This triangle has been rotated in a clockwise

direction.

• WHY?

Question 4

• TRUE• This triangle has been rotated in a clockwise

direction.

• WHY? Notice the movement of A to A’ and so on. It is in a clockwise direction.

Question 5

• TRUE or FALSE?• Fish 2 is a 45° counterclockwise rotation of Fish 1.

• WHY?

Question 5

• TRUE• Fish 2 is a 45° counterclockwise rotation of Fish 1.

• WHY? Remember 45° is half of a 90° rotation.

Question 6

• TRUE or FALSE?• Polygon A'B'C'D' is a 180 degree

counterclockwise rotation of polygon ABCD.

• WHY?

Question 6

• TRUE• Polygon A'B'C'D' is a 180 degree

counterclockwise rotation of polygon ABCD.

• WHY? Remember the letters which label the diagram do not have to be rotated.

Question 7

• TRUE or FALSE?• Seahorse 2 is a 90° counterclockwise of

Seahorse 1.

• WHY?

Question 7

• FALSE• Seahorse 2 is a 90° counterclockwise of

Seahorse 1.

• WHY? The rotation is 90° clockwise or 270° degrees counterclockwise.

Question 8

• Graph ΔABC under the following rotations:– R90°(ΔABC)=ΔA’B’C’

– R180°(ΔABC)=ΔA’’B’’C’’

– R270°(ΔABC)=ΔA’’’B’’’C’’’

Question 8

• Graph ΔABC under the following rotations:– R90°(ΔABC)=ΔA’B’C’

– R180°(ΔABC)=ΔA’’B’’C’’

– R270°(ΔABC)=ΔA’’’B’’’C’’’