Parallelogram Area Demonstration This resource provides animated demonstrations

Parallelogram – Area – Demonstration This resource provides animated demonstrations of the mathematical method. Check animations and delete slides not needed for your class.

What is the area of this blue & yellow rectangle ? 3 cm 10 cm We can rearrange the pieces What is the area of this blue & yellow shape? What do we call the new shape? How can we calculate the area of these types of shapes?

Area of a Rectangle = base × height Area = 40 cm 2 4 cm 10 cm We can cut off one corner of the rectangle and move it to make a parallelogram. The area stays the same. Area of a Parallelogram = base × height Area = 40 cm 2

Area of a Parallelogram = base × height 10 cm 5 cm 6 cm 14 cm Calculate the areas of these parallelograms. Area = 50 cm 2 4 cm Which measurements do we need to use? Area = 28 cm 2 7 cm 9 cm

Area of a Parallelogram = base × height 12 c 8 cm 3 cm 4 cm 7 c m 12 cm D 10 cm 7 cm C 11 cm m 5 c 5 cm A B m Calculate the area of each shape & match with an answer 21 cm 2 35 cm 2 40 cm 2 44 cm 2 120 cm 2 81 cm 2 These shapes are congruent. E m 5 cm 10 c 5 cm 3 cm 7 c m F 9 cm

Area of a Parallelogram = base × height 7 c 12 c m 12 cm 10 cm 7 cm 21 cm 2 4 cm D These shapes are congruent. 120 cm 2 E 35 cm 2 5 cm m 5 cm 81 cm 2 3 cm 7 c m F 10 c m 5 c C 44 cm 2 8 cm 3 cm 11 cm A B 5 cm 40 cm 2 m Calculate the area of each shape & match with an answer 9 cm

Questions? Comments? Suggestions? …or have you found a mistake!? Any feedback would be appreciated . Please feel free to email: tom@goteachmaths. co. uk