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Areas of Parallelograms
Age 14 to 16
Challenge Level 
Try drawing a rectangle around the parallelogram. If
you can work out the area of the rectangle and the areas of the
parts of the rectangle outside the parallelogram, then you should
be able to find the area of the parallelogram.
Don't forget that you can break up complicated shapes into simpler small shapes (such as triangles and rectangles) whose areas are easier to find.
Don't forget that you can break up complicated shapes into simpler small shapes (such as triangles and rectangles) whose areas are easier to find.
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Equilateral Areas
ABC and DEF are equilateral triangles of side 3 and 4 respectively. Construct an equilateral triangle whose area is the sum of the area of ABC and DEF.