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Sagot :
The area used to make the triangular flag is 15 square inches.
Given
Two of the sides are 8 in.
Lila made a triangular flag to cheer on her favorite sports team.
The perimeter of the flag is 20 inches.
What is Heron’s formula?
Semi-perimeter is equal to the sum of all three sides of the triangle divided by 2.
Then,
The value of S is;
[tex]\rm S = \dfrac{20}{2}\\\\S =10[/tex]
Therefore,
The area used to make the triangular flag is;
[tex]\rm Area = \sqrt{s(s-a)(s-b)(s-c)} \\\\A rea= \sqrt { (10)(10-8)(10-8)(10-4) }\\\\Area = \sqrt{10 \times 2 \times 2\times 6}\\\\Area = \sqrt{240}\\\\Area = 15.49[/tex]
Hence, the area used to make the triangular flag is 15 square inches.
To know more about Heron's formula click the link given below.
https://brainly.com/question/13907146
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