johnwick120 johnwick120
  • 07-04-2020
  • Mathematics
contestada

I need help with this please!

I need help with this please class=

Respuesta :

PollyP52 PollyP52
  • 07-04-2020

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.

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