Asquare pyramid is shown. what is the surface area? pls ill give brainiest! a square based pyramid, with bases labeled 2.5 centimeters and side length of triangle labeled 5 centimeters. a. 15.25 cm2 b. 15.625 cm2 c. 31.25 cm2 d. 62.625 cm2

C.31.25cm^2
To work out the area of the square(the bottom of pyramid) you square 2.5 which is 6.25
Then you work out the area of a triangle- 2.5*5/2=6.25
Times 6.25 by 4 because it is a square based pyramid =25
Then add the square and triangles together
25+6.25=31.25cm

The answer to your question is the last one