Question

Geometry-Angles-Triangles- I need help

Answer 1

The closest answer to this is C=12

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.

`√(74)=7^(2) +b^(2)`

`√(74)=b^2\\-49\\`

`about -40.3976747`

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