Marsha has 3 rugs. the first rug is 2 meters 87 centimeters long. the second rug has a length 98 centimeters less than the the f
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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.
<h3>What is Heron’s formula?</h3>Semi-perimeter is equal to the sum of all three sides of the triangle divided by 2.
Then,
The value of S is;
Therefore,
The area used to make the triangular flag is;
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.
Answer:
93
Step-by-step explanation:
Setup an equation. Add the 5 tests together, the unknown test will be represented by x, Since there are 5 tests total, you will divide by 5. to find the average.
To solve first multiply both side by 5.
Add the left side and then solve for x
Subtract 357 from both sides
357 - 357 + x = 450 - 357
x = 93
The last test has to be a score of 93 to get an average of 90.