# Chapter 1 - Section 1.1 - Angles, Degrees, and Special Triangles - 1.1 Problem Set: 24

No, We could not answer Problem 23 in such case.

#### Work Step by Step

If we did not know that the vertical posts were perpendicular to the horizontal, we would not be able to conclude that sum of α and β is $90^{\circ}$ as we can not establish that triangle ABC formed by producing line along vertical post to the horizontal is right triangle thus we could not answer Problem 23 in such case.

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