Answer:
Let x be AD.
(8x)/2 = 40
8x = 80
x = 10
AD is 10cm.
Explanation:
Altitude = Height = AD = ?
Base = 8 cm
Area = 40 cm²
Area = 1/2 (Base * Height)
40 = 1/2 ( 8 * Height)
40 = 4 * Height
Dividing both sides by 4
40 / 4 = Height
Height = 10 cm
Hope this helped!
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