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12-06-2020
Mathematics

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The two shorter sides of a right-angled triangle have lengths a and b. a is increased by 33% and b is decreased by 12%.
What is the percentage change in the area of the triangle?

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12-06-2020

Answer: 17.04% increase

Step-by-step explanation:

The area of a triangle is (ab)/2

The area of the new triangle is (1.33a)(0.88b)/2

= 1.1704ab/2

= 17.04% increase

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