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  3. [img]2015m7x/ct_egreqj_egreqjs_0079_20151[/img]What is the area of triangle ABC

[img]2015m7x/ct_egreqj_egreqjs_0079_20151[/img]What is the area of triangle ABC

游客2025-02-23  20
问题
What is the area of triangle ABC shown above?
选项 A、18
B、20
C、12
D、18
E、36
答案 D
解析 The triangle is a 30°-60°-90° triangle, so the ratio of the lengths of the legs is 1 to. Since the length of the shorter leg, AB, is 6, it follows that the length of the longer leg, AC, is 6. The area of the triangle is therefore, or 18. The correct answer is Choice D.
This explanation uses the following strategies.
Strategy 4: Translate from a Figure to an Arithmetic or Algebraic Representation
Strategy 8: Search for a Mathematical Relationship
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