If all the sides of a right triangle increase in length by 30%, then by what percentage does the area of the triangle increase?	Choices
A) 69%	B) 81%	C) 85%	D) 96%	E) 120%
Let B be the base and H be the height of the original triangle.   The original area is (1/2)BH.   The area of the expanded triangle is (1/2)(1.3B)(1.3H) = (1.3)(1.3)(1/2)BH = 1.69(1/2)BH   The answer is 69%.
<result>A</result>
If all the sides of a right triangle increase in length by 30%, then by what percentage does the area of the triangle increase?