To find the surface area of this pier amid, you will find the area of the base and the areas of all for triangular lateral faces. Add these together for the total surface area in the end.
Base : 18 x 10 = 180 cm²
1st set of lateral faces:
A = 1/2 x b x h
1/2 x 13 x 18
A = 117 cm² x 2
234 cm²
2nd set of lateral faces:
1/2 x 10 x 15
A = 75 cm² x 2
150 cm²
150 cm² +234 cm² +180 cm²
The surface area of the pyramid is 564 cm².
