3
Answer: DSet 4: Triangles (Beginner)
Explanation
PROBLEM
A triangle has base 18 and height 9. What is its area?
A triangle has base 18 and height 9. What is its area?
A.
82
B.
84
C.
80
D.✓ Correct
81
Detailed Explanation
Choice D is the best answer. Area = (1/2) times base times height = (1/2) times 18 times 9 = 81
Why others are wrong:
A: 82 is incorrect because it does not satisfy the equation.
B: 84 is incorrect because it does not satisfy the equation.
C: 80 is incorrect because it does not satisfy the equation.