Module 7 Lesson 12 Measure side lengths in whole number units to determine the perimeter of polygons. Perimeter: The distance around a two-dimensional.

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Presentation transcript:

Module 7 Lesson 12 Measure side lengths in whole number units to determine the perimeter of polygons. Perimeter: The distance around a two-dimensional shape.

Multiply by 7 7 x 7 = _____ Let’s skip-count up by Sevens to find the answer. Hold up a finger for each seven x 7 = _____ 63 Let’s see how we can skip-count start at 35. Start by holding up five fingers. Raise one more finger each time we count. 6 x 7 = _____ Let’s see how we can skip-count down from 70. Start by holding up 10 fingers. Put down one finger each time we count down.

Multiply by 7 Pattern Sheet 2 minutes End

Equivalent Counting With Units of three2 threes3 threes4 threes5 threes6 threes7 threes8 threes9 threes 10 threes 1 x 3=32 x 3=63 x 3=94 x 3=125 x 3=156 x 3=187 x 3=218 x 3=249 x 3=2710x3=30 First let’s skip count by three 10 times. Now let’s count up to 10 groups of 3, or 10 threes. And last, let’s say the multiplication sentences!

Area & Perimeter Let’s draw a rectangle that is 2 units wide by 3 units long. What is the area of the rectangle?

Area & Perimeter Let’s draw a rectangle that is 2 units wide by 4 units long. What is the area of the rectangle?

Area & Perimeter Let’s draw a rectangle that is 3 units wide by 5 units long. What is the area of the rectangle?

Concept Development We have learned that the “boundary” of a shape is the shape’s perimeter. Discuss with your partner: What forms the boundary of this shape? That’s right! The sides of the shape form the boundary.

Concept Development What can we use to measure the perimeter of this shape? A ruler!

Concept Development 10 cm 4 cm Let’s write a number sentence to tell us the perimeter of the shape = _____________ = 28 cm

Concept Development Let’s try it again! I will pass out the lesson template. Get out your ruler. Measure the sides and calculate the perimeter of each shape. We have already measured shape A. Measure to the nearest centimeter.

Concept Development 3 cm 5 cm 4 cm Perimeter: = 12 cm

Concept Development 3 cm 6 cm Perimeter: = 20 cm 4 cm

Concept Development 7 cm Perimeter: = 22 cm 4 cm 7 cm

Concept Development 6 cm Perimeter: = 28 cm 3 cm 6 cm 8 cm 3 cm 2 cm

Try it Out! At lunch, Angela measure the sides of a square napkin. Each side measures 6 inches. What is the perimeter of the napkin? 6 inches 6 x 4 = 24. The perimeter of the napkin is 24 inches.