Respuesta :

The answer is 46.10 just look it up

Answer:

45

Step-by-step explanation:

the formula is (P x slant height over 2) + B

P = perimeter of the base

B = area of the base

P = 3+3+3+3  P=12

B=3x3  B = 9

12 x 6 = 72    72 divided by 2 = 36    36 + 9 = 45

the surface area of your triangle is 45 cm squared