Answer:
7 inches
Explanation:
Area = ½ base × height
63 = ½ × base × 18
63 = 9 × base
base = 7 inches
The area of a triangle is found by
A = 1/2 bh
We know the height is 18 and the area is 63
63 = 1/2 (b)(18)
63 = 9b
Divide each side by 9
63/9 = 9b/9
7 = b
The base is 7 inches
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