ISEE Mathematics Achievement Question 274: Answer and Explanation
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Question: 274
4. The area of a rectangle with width 4 and length 3 is equal to the area of a triangle with a base of 6 and a height of
- A. 1
- B. 2
- C. 3
- D. 4
Correct Answer: D
Explanation:
D First find the area of the rectangle with a width of 4 and length of 3: A = l × w = 3 × 4 = 12. The area of the triangle is also equal to 12, so A = 
bh = 12. Plug in the given value for the base: (6)h = 12. Simplify to find that 3h = 12, and then divide both sides by 3. The height must be 4, so the correct answer is (D).