SSAT Math Question 429: Answer and Explanation
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Question: 429
3. A ladder is placed against a building. If the ladder makes a 55° angle with the ground, what is the measure of the angle that the ladder makes with the building?
- A. 25°
- B. 30°
- C. 35°
- D. 40°
Correct Answer: C
Explanation:
C is correct. In this problem you know two of the three angles, one measuring 55° and the other measuring 90°, since the building forms a 90° angle with the ground. Together those two angles measure 145°. Since a triangle has a total of 180°, the third angle must measure 180° − 145° = 35°.