Answer:
Hence surface area = 7.94 sq inches
Step-by-step explanation:
Formula of surface area of equilateral triangular pyramid = A + (3/2) bh
A = the area of the pyramid's base = 1.1 sq inches
b = the base of one of the faces, = 4.8 ÷ 4 = 1.2 inches
h = slant height of one of the faces = 3.8 inches
Hence surface area = A + (3/2)bh = 1.1 + (3/2)(1.2 x 3.8) = 7.94 sq inches
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