Lesson 3 Specific Side Lengths

    • Let’s find and draw shapes with specific side lengths.

Warm-up Which One Doesn’t Belong: Different Shapes

Which one doesn’t belong?

  1. 4-sided shape.
  2. Four-sided shape.
  3. Two shapes, six-sided and four-sided.
  4. Diagram. Curved top with straight line at the bottom.

Activity 1 Measure Twice, Draw Once

Problem 1

Diego drew a shape that has fewer than 5 sides. Two sides are 3 centimeters long. Circle shapes that could be Diego’s shape.

  1. Hexagon.
  2. Triangle.
  3. Rectangle.
  4. A square.

Problem 2

Tyler drew a shape that has 4 sides. Each side is 2 inches long.

  1. Circle shapes that could be Tyler’s shape.

    1. Hexagon.
    2. Square.
    3. A square.
    4. Rhombus.

  2. Draw another shape that could be Tyler’s shape.

  3. Priya drew a shape that has more sides than Tyler’s shape. Only one side of her shape is 2 inches long. Draw two shapes that could be Priya’s shape.

Activity 2 Build a Shape

Problem 1

  1. Choose your own attributes. Circle an attribute from each row.

    sides

    corners

    side length

    1 side is 2 in.

    2 sides are 2 in.

    2 sides are 3 in.

    4 sides are 2 in.

    square corners

    all square corners

  2. Draw and name a shape with the attributes you chose. If you cannot draw the shape, explain why.

    Name:

    Shape:

Problem 2

  1. Choose your own attributes. Circle an attribute from each row.

    sides

    corners

    side length

    1 side is 2 in.

    2 sides are 2 in.

    2 sides are 3 in.

    4 sides are 2 in.

    square corners

    all square corners

  2. Draw and name a shape with the attributes you chose. If you cannot draw the shape, explain why.

    Name:

    Shape:

Problem 3

  1. Choose your own attributes. Circle an attribute from each row.

    sides

    corners

    side length

    1 side is 2 in.

    2 sides are 2 in.

    2 sides are 3 in.

    4 sides are 2 in.

    square corners

    all square corners

  2. Draw and name a shape with the attributes you chose. If you cannot draw the shape, explain why.

    Name:

    Shape:

Problem 4

Cover your attribute table and trade papers with your partner. Guess which attributes they used to draw their shape.

Problem 5

If you have time… Are there any attributes that are impossible to put together to make a shape? Show or explain.

Practice Problem

Problem 1

  1. Draw a quadrilateral that has 3 sides that are 2 inches long.

  2. Draw a different quadrilateral that has 3 sides that are 2 inches long.