Explain why the triangles are similar. Then find the missing length, x. 30 in. 18 in. 10 in. 42 in. 14 in. ..... Choose the reason that the triangles are similar. O A. Both triangles are obtuse. O B. The vertical angles in the triangle are equal in measure. O C. The angles in the small triangle are equal in measure to their corresponding angles in the large triangle. O D. The sum of the three angles in each triangle is 180°.

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