Answer:
The closest answer to this is C=12
Step-by-step explanation:
With isosceles triangles we know 2 sides are equal and the base angles are equal. We have to find the value of x which is the third side of the triangle. We can see half of x is the third side of another triangle formed. we can use the Pythagorean theorem find the leg of half of one of the triangles.
[tex]\sqrt{74}=7^{2} +b^{2}[/tex]
[tex]\sqrt{74}=b^2\\-49\\[/tex]
[tex]about -40.3976747[/tex]
We have to take the square root of this to get 1/2 of x..
B= about 6.35591651
If we muiltply this by 2 we get around 12.711833
The closest answer to this is C=12
