As we well know from the school curriculum in geometry, in order to determine what the radius of a circle that is described around a triangle is equal to, you should use the following formula:
R = a * b * c / 4S.
Let us determine that the value will equal the area of a triangle, whose sides have lengths of 4.6 and 8 centimeters, respectively, if from the condition of our problem we know for sure that the radius of the circle into which it is inscribed is 3 cm:
S = 4 * 6 * 8 / (4 * 3) = 16.
Answer It is equal to 16 cm2.
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