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Example Question #172 : Act Math
The base of a triangle is and the area is . The height of the triangle is then decreased by . What is the final area of the triangle?
Possible Answers:
Correct answer:
Explanation:
The formula for the area of a triangle is
.
If the area is equal to 48 cm2 and the base is 8 cm, then the initial height is:
If 12 is decreased by 75% then
, and . The final height is 3 cm.
Therefore the final area is
.
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