1. What is the perimeter of this rhombus? Explain or show your reasoning.

   

2. Diego says he can find the area of this rectangle because he knows 2 side lengths.

   Do you agree with Diego? Explain your reasoning.

   

The spinning part of a windmill is called a rotor. This figure represents a rotor with 5 blades.

1. Draw the lines of symmetry for the figure.

2. Each blade is 5 feet long and \(1 \frac{1}{2}\) feet wide. What is the perimeter of the rotor, as shown in the diagram? Explain or show your reasoning.

Here is Rectangle R.

1. What shape can be folded once along a line of symmetry to create R? What are the side lengths of that unfolded shape?

   

2. What shape can be folded twice along lines of symmetry to create R? What are the side lengths of that unfolded shape?

Make a shape or design with 1 or more lines of symmetry. Trade shapes with a partner and find all the lines of symmetry of your partner's shape. You may find pattern blocks helpful to make your shape or design.