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These are basically the steps:

* Use the formula for the area of a triangle to calculate the height.

* Use the height and half the base to calculate the lateral sides. Use the Pythagorean Theorem. (It helps to draw a sketch, to visualize the situation.)

* Add the three sides to get the perimeter.

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Q: What is the perimeter of an isosceles triangle whose base is 15.96 cm with an area of 84.9072 square cm showing all work and answer?
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