Answer:
a. 197.4 cm^2.
Step-by-step explanation:
Area of the base = 7*7 = 49 cm^2.
Area of each triangular face = 1/2 * 10.6 * 7
= 37.1 cm^2
Total surface area of pyramid = 4* 37.1 + 39
= 197.4 cm^2.
