What is the surface area of a square pyramid with base length of 10 cm and slant height of 20 cm?(1 point)
The surface area of a square pyramid can be calculated using the formula:
Surface area = B + (1/2)Pl
Where B is the area of the base, P is the perimeter of the base, and l is the slant height.
Given that the base length is 10 cm, the perimeter of the base is 4 * 10 = 40 cm.
The area of the base is 10 * 10 = 100 cm².
So, the surface area of the square pyramid is:
Surface area = 100 + (1/2)(40)(20) = 100 + 400 = 500 cm²
Therefore, the surface area of the square pyramid is 500 cm².