Lesson 9 Equal Pieces

• Let’s split shapes into equal-size pieces.

Warm-up Which One Doesn’t Belong: Pieces of Shapes

Which one doesn’t belong?

Problem 1

Today we are going to make circles. Each circle will be made up of four pieces. You will walk around and find three other people who have pieces that fit with yours to make a circle.

Problem 2

Synthesis:

Which of these shows equal pieces that make a circle?

Activity 2 Fold into Equal Pieces

1. Cut out one circle and one square.

Fold each shape so that there are 2 equal pieces.

Be ready to explain how you know your shape has 2 equal pieces.

2. Cut out one circle and one square.

Fold each shape so that there are 4 equal pieces.

Be ready to explain how you know your shape has 4 equal pieces.

Activity 3 Halves or Fourths

1. Split each shape into halves.

2. Split each shape into fourths.

3. Split each shape into fourths.

4. Split each shape into halves.

5. Split each shape into halves.

6. Split each shape into fourths.

Problem 1

1. Han drew this picture to show a circle split into fourths.

Do you agree with Han?

Show your thinking using drawings, numbers, or words.

2. Split the rectangle into fourths.