The area of the proposed design of the green section whose lengths of side a and b is given is 193.11ft².
What is a triangle?
A triangle is simply a two-dimensional polygon with 3 sides and 3 interior angles.
A right angled triangle is a triangle with one of the angles as 90 degrees.
The area of a right angled triangle is expressed as;
A = (1/2)ab
Where a and b are the length of the two sides other than the hypotenuse
Given the data in the question;
We substitute our values into the expression above.
A = (1/2)ab
A = (1/2) × 31.4ft × 12.3ft
A = 193.11ft²
Therefore the area of the proposed design of the green section whose lengths of side a and b is given is 193.11ft².
Learn more about area of triangles here: https://brainly.com/question/19305981
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