Module 9: Creating Triangles given side lengths

Module 9

Lesson 2

I CAN Create Triangles Given Side Lengths

Exit Ticket from yesterday

2 Questions

Subject | Subject

Some text here about the topic of discussion

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So if the scale drawing has a diameter of 6 inches and the real table will have a diameter of 48 inches, how many inches of the table does 1 inch on the scale drawing represent? Meaning the scale is:

drawing : real

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per ​

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1 inch (drawing)

8 inches (real)

8 inches (drawing)

1 inch (real)

48 inches (real)

48 inches (drawing)

6 inches (real)

6 inches (Drawing)

​You have 4 popsicle sticks with lengths of 4 cm, 6 cm, 8 cm, and 10 cm long. Find out which combinations make a triangle and which do not. WRITE IT DOWN!

Popsicle sticks:

5 Minutes

Match

Which combinations worked and which did not?

• 4,6, and 8

• 4,6, and 10

• 4,8, and 10

• 6,8, and 10

Triangle

No Triangle

Triangle

Triangle

• Triangle

• No Triangle

• Triangle

• Triangle

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In this activity, we learned that the SUM of 2 sides of a triangle must be ​

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the 3rd side.This is called the TRIANGLE INEQUALITY THEOREM

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greater than

less than

greater than or equal to

less than or equal to

​​1 inch

2 inches

4 inches

​​3 inches

4 inches

7 inches

​​5 inches

2 inches

6 inches

Using a ruler and a compass, on a piece of paper, draw triangles with the following labeled measurements:

​Name:

Date:

Period:

​Circle the Triangle(s) that worked and turn it in.

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George has 3 wooden rods. the 3 rods are different lengths of 6 feet, 3 feet, and 5 feet. George ​

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make a triangle with these rods.

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can

cannot

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Irma has 3 straws. the 3 straws are different lengths of 7 inches, 4 inches, and 11 inches. Irma ​

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make a triangle with these straws.

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cannot

can

Drag and Drop

Mary has 3 pieces of pipe cleaner. the 3 pieces are different lengths of 5 inches, 4 inches, and 10 inches. Mary ​

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make a triangle with these pieces of pipe cleaner.

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cannot

can