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Properties of Parallelograms
Discover properties of parallelograms Learn new vocabulary related to vectors
Practice construction skills Develop inductive reasoning and cooperative behavior
P
Properties of Parallelograms
• To discover the properties of a parallelogram, let’s first construct one
• Use the blue lines on your paper to create the first two sides– Make sure the lines are at least 6 cm apart
• Next, use the two opposite sides of your ruler to create the other two lines of the parallelogram
What’s Going on with the Angles
• Measure all of the angles of your parallelogram
• Notice anything!?!
Let’s Practice• This means that if we are only given one angle
of a parallelogram, we can find all the other angles
• Find a, b, and c
c
What Else!?!?• Measure the lengths of your parallelogram to
the nearest cm.• What can we notice about the opposite sides
of a parallelogram?
WHAT ELSE!?!?!?
• Now, draw in the diagonals of your parallelogram
• What do you notice about the diagonals? (hint: measure all 4 new segments)
Vector Diagrams• Vectors describe quantities in physics, such as
velocity, acceleration, and force. You can represent a vector by drawing an arrow. The length and direction of the arrow represent the magnitude and direction of the vector. For example, a velocity vector tells you an airplane’s speed and direction. The lengths of vectors in a diagram are proportional to the quantities they represent.