The area of a triangle is 57cm² and height of 4cm. what is the length of the base
A: 10 cm
B: 28.2 cm²
C: 12 cm
D: 28.2 cm
Given:
Area (A) = 57cm²
Height (H) = 4cm.
A = ½ * b * h
57 = ½ * b * 4
57 = 2b
b = 57/2
b = 28.2 cm
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