Official Guide Explanation:
Data Sufficiency #74




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Solution and Metadata

Question: 74
Page: 279
Difficulty: 4 (Moderately Easy)
Category 1: Geometry > Triangles > other

Explanation: The area of a triangle is one - half the product of the base and the height, so we'll need those two measurements to find the area of triangle ABC. Statement (1) gives us just that: AC is the base and BD is the height, so the area is one - half the product of those two measurements. Statement (2) is irrelevant, as we need side lengths to find the area of a triangle. Choice (A) is correct.

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