Let the sides be s:-
If: 0.5*s squared*sin(60 degrees) = 97.428
Then: s = square root of 97.428*2/sin(60 degrees) => 15.00001094
Perimeter: 3*15 = 45 cm
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Using trigonometry the area of the isosceles triangle 60 square cm and its perimeter is 48 cm both rounded to the nearest integer
Area of a triangle = 1/2*base*height Use Pythagoras to find the height which is 7.794228634 inches Area = 1/2*9*7.794228634 = 35.07402885 square inches Answer: 35 square inches to the nearest square inch.
13.00
15.00
2,138.5 rounded to the nearest integer is 2,139