# publicKhan/khan-exercises

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  a46a295d » osnr  2012-06-27 Add new exercise: area of parallelograms. 1 2 3 4 5 Area of parallelograms 6 7 8 72 73 74
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76 randFromArray([ 77 ["in", "inch"], 78 ["ft", "foot"], 79 ["m", "meter"], 80 ["cm", "centimeter"], 81 ["", "unit"] 82 ]) 83 84 randRange(1, 8) 85 randRange(1, 8) 86 87 randRangeNonZero(-2, 2) 88 89 B * H 90
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Suppose a parallelogram has base length B \text{ UNIT} and height H \text{ UNIT}.
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What is the parallelogram's area?
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98 K 99 square plural(UNIT_TEXT) 100
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104 graph.p = parallelogram(B, H, UNIT, SH); 105 106 graph.p.drawBase(); 107 graph.p.drawHeight(); 108
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By moving a slice of the parallelogram, we can see that its area is equal to that of a rectangle with the same base and height.

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112 graph.p.sliceHint(); 113 graph.p.animHint(); 114
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area of rectangle = b \times h

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119 graph.p.drawArea(); 120
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A = B \times H = K

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