ISEE Mathematics Achievement Question 225: Answer and Explanation
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Question: 225
9. In the triangle shown, side a is 4 ft long and side b is 6 ft long. What is the area of the triangle?
- A. 12 ft2
- B. 18 ft2
- C. 24 ft2
- D. 36 ft2
Correct Answer: A
Explanation:
A is correct. To find the area of a triangle, use the formula A = (½)bh where b is the base of the triangle and h is the height. Because the triangle shown is a right triangle, side a is the height. Substituting into the formula: A = (½)(6)(4) = 12 ft2.