The base of given triangle is 8 cm.
Further explanation:
The area of triangle is calculated by using two methods
Hero's formula requires all three sides of triangle while we can use only base and height in second formula.
Given
[tex]A = 20\ cm^2\\h = 5\ cm[/tex]
As the area of triangle and height are given, then
[tex]A = 0.5*b*h\\20=0.5*b*5\\20=2.5b\\b=\frac{20}{2.5}\\b=8\ cm[/tex]
The base of given triangle is 8 cm.
Keywords: Area of triangle, base, height
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