Question

PLEASE HELP ME I DON'T KNOW HOW TO DO THIS

Answer 1

Area of each lateral area = 1/2 * 14* 15 
Total lateral area  ( as it has 3 lateral sides)  = 3 * 1/2 * 14 * 15 =  315 cm^2

Total surface area = 315 * 1/2 * 14 * 15 =  420 cm^2


Hexagonal pyramid

Lateral area = 6 * area of each triangle =  6 * 1/2 *10 * 35 =  1050 cm^2

Total S A = 1050 + area of the hexagonal base =  1050 +  3 sqrt3 10^2 / 2
= 1050 + 259.8 = 1309.8 cm^2