1. To solve this problem, we need the following formulas:
Formula for the area of an isosceles triangle: S = 1/2 * a * h, where a is the sides of the triangle and h is the height of the isosceles triangle.
2. Let’s use the formula for finding the area of an isosceles triangle and substitute in it known quantities such as side a = 17 cm and height h = 5 cm, then we get:
S = 1/2 * a * h = 1/2 * 17 cm * h = 1/2 * 17 cm * 5 cm = 8.5 cm * 5 cm = 42.5 cm ^ 2.
Answer: the area of an isosceles triangle = 42.5 cm ^ 2.
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