# 1.7 Geometry and Time

## Unit Goals

• Students reason with shapes and their attributes, partition shapes into equal pieces, and tell time to the hour and half hour.

### Section A Goals

• Build and draw shapes to possess defining attributes.
• Compose two-dimensional or three-dimensional shapes to create a composite shape.
• Describe attributes of two-dimensional and three-dimensional shapes.

### Section B Goals

• Partition circles and rectangles into two and four equal pieces and describe the pieces with words (halves and fourths).

### Section C Goals

• Tell and write time in hours and half-hours.

### Problem 1

#### Pre-unit

Practicing Standards:  K.G.A.2

Name each shape.

### Problem 2

#### Pre-unit

Practicing Standards:  K.G.A.2

Color in all of the triangles.
Cross out all of the rectangles.

### Problem 3

#### Pre-unit

Practicing Standards:  K.G.A.2

Cross out all of the circles.

### Problem 4

Jada felt a shape in a bag.
She felt a point and a curve.
Circle the shape that could be in the bag.

A:

B:

C:

D:

### Problem 5

This is the tallest skyscraper in the world.

Use the blocks to build a shape that looks like the skyscraper.

### Problem 6

Here is how Diego sorted some shape cards.

Draw each shape where it belongs on Diego’s chart.

### Problem 7

Here is a shape.
1. Draw the shape on dot paper.
2. Describe the shape.

### Problem 8

Is this shape a triangle? Why or why not?

### Problem 9

1. Draw 2 different rectangles and 2 different squares.

2. How are the shapes the same? How are they different?

### Problem 10

1. Use pattern blocks to fill the outline in different ways.

2. Write the number of pattern blocks you used for each way.

### Problem 11

#### Exploration

1. Choose an object in the classroom or outside and use the geoblocks to build the object.
2. Share your object with a partner and try to guess what your partner built.

### Problem 12

#### Exploration

1. What is the smallest number of pattern blocks you can use to fill in the puzzle?
2. What is the largest number of pattern blocks you can use to fill in the puzzle?
3. Can you fill in the puzzle using exactly 12 pattern blocks?

### 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.

### Problem 2

1. Split the circle into fourths.
2. Color in four of the fourths.

### Problem 3

1. How much of each rectangle is shaded?

______________________    ______________________

2. Circle the rectangle that has a bigger shaded piece.

### Problem 4

#### Exploration

1. Kiran says half of the square is shaded.

Do you agree with Kiran?

Show your thinking using drawings, numbers, or words.

2. Priya says half of the square is shaded.

Do you agree with Priya?

Show your thinking using drawings, numbers, or words.

### Problem 5

#### Exploration

Han wonders if half of the circle is shaded.
What do you think?

### Problem 1

1. What time does each clock show?

____:________

____:________

2. Show each time.

3:00

7:00

### Problem 2

Han says the clock shows half past 11.

Do you agree with Han?
Show your thinking using drawings, numbers, or words.

### Problem 3

What time does each clock show?
1.

2.

3.

### Problem 4

#### Exploration

Show the time during the day when you might do each of these things.

1. wake up in the morning
2. go to school
3. have a snack
4. go for recess
5. have lunch