Given ƒ(x) = 3x + 9, find x when ƒ(x) = 21.
2 answers:
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Answer:
Step-by-step explanation:
Given
Required
Calculate the perimeter of A B C
To calculate the perimeter of A B C, we sum up the sides of the triangle
i.e.
AB is given in the question already.
So, we need to calculate B F and F C
To solve for BF, we consider triangle B F C
Using Pythagoras Theorem, we have:
Substitute values for BF and FC;
Next, we calculate A C.
To calculate A C, we need to calculate A F, considering triangle B F A
Using Pythagoras Theorem, we have:
Substitute values for B F and A B;
Since F lies on line A C:
Recall that:
<em>Hence, the perimeter is 38.6</em>