2D Dimensional Shape Questions

What dimensional shape is this?

• 
  

  3 Dimensional shape

• Squares

• 
  

  2 Dimensional shape

• Irregular polygon

Lucy says the shape shown is not a 2 dimensional shape because all four sides are not the same length. Is Lucy's reasoning correct and why?

• 1. No, Lucy is incorrect. The shape is a 2 dimensional shape and all four sides are the same length.

• 1. Yes, Lucy is correct. The shape is not a 2 dimensional shape because all four sides are not the same length.

Ali wants to build a swimming pool in a rectangular shape. The length is 45 cm. How much is the width if the area was given as 945 cm².

• 27 cm

• 37 cm

• 13 cm

• 21 cm

A two-dimensional shape has only two measurements. What are measurements?

• length × height

• length × width

• height × width

You have a rectangular mosaic tile that is 5 cm in length and 2 cm in width. You want to create a rectangular mosaic art piece that is 20 cm in length and 12 cm in width. How many mosaic tiles will you need to cover the entire art piece, and how many will be left over?

Sarah's family has a triangular garden with sides measuring 8 meters, 15 meters, and 17 meters. She wants to plant different flowers in the garden, and each type of flower requires 1 square meter of space. Can she plant her chosen flowers without wasting any space, or will there be some leftover space? If so, how much?