Lesson 7 Rectangles and Squares
Let’s learn more about rectangles and squares.
Warm-up What Do You Know About …?
What do you know about this shape?
Activity 1 Quadrilateral Clues
Spread out your shape cards so you and your partner can see all of them.
Work together to find a shape that fits each clue. If you don’t think it is possible to find that shape, explain why. You can only use each shape one time.
Find a quadrilateral that is not a parallelogram.
Find a rhombus that is also a square.
Find a rhombus that is not a square.
Find a trapezoid that is not a rectangle.
Find a rectangle that is not a square.
Find a parallelogram that is not a rectangle.
Find a square that is not a rectangle.
Activity 2 Always, Sometimes, Never
Write always, sometimes, or never in each blank to make the statements true.
For each statement that is completed with “sometimes,” draw a figure for which the statement is true and another figure for which the statement is not true.
A rhombus is a square.
A square is a rhombus.
A triangle is a quadrilateral.
A square is a rectangle.
A rectangle is a parallelogram.
A parallelogram is a rhombus.
A trapezoid is a parallelogram.
Decide if each statement is true or false. Explain or show your reasoning.
A parallelogram is sometimes a rhombus.
A rhombus is always a parallelogram.
A trapezoid is never a rectangle.
A rectangle is never a square.
A parallelogram is always a trapezoid.