» Since an altitude BD is drawn that is perpendicular to AC, then the two created right triangles and the original must be similar. We will use the The Geometric Mean Theorem to prove that ∆ABC is a Right Triangle.
» Solve the quadratic equation by factoring.
» Use only the positive solution. Thus, AD is 9 units. Use the Pythagorean Theorem to prove that ∆ABC is a right triangle.
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✒️RIGHT TRIANGLE
» Since an altitude BD is drawn that is perpendicular to AC, then the two created right triangles and the original must be similar. We will use the The Geometric Mean Theorem to prove that ∆ABC is a Right Triangle.
» Solve the quadratic equation by factoring.
» Use only the positive solution. Thus, AD is 9 units. Use the Pythagorean Theorem to prove that ∆ABC is a right triangle.
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