How to find the perimeter of a triangle given a lot of tangent lines

The video tutorial covers the properties of tangent lines to a circle, emphasizing that a tangent line touches the circle at one point and forms a 90-degree angle with the radius. It explains that if two tangent lines originate from the same external point, they are congruent. The tutorial then demonstrates how to calculate the perimeter of a triangle formed by tangent lines, using given lengths and solving for unknowns. The final perimeter is calculated by summing the lengths of all sides, and the solution is verified.

If one side of a triangle is 4 and another is 13, what can you conclude about the other sides?

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Calculate the perimeter of a triangle with sides measuring 4, 4, 13, and 9.

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