10 August 2011
97. Triangle reduced to 3 square units
If the length of 1 matchstick is 1 unit, the area of the triangle is:
= 1/2 X 4 X 3
= 6 square units
Move 4 sticks to reduce the area to 3 square units.
It should be clear that the area marked "A" is 3 square units, which means the remaining area is also 3 square units.
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