The formula to calculate the surface area of a pyramid is:
Surface Area = 1/2 * Base Perimeter * Slant Height + Base Area
Given that the base of Sally's Pyraminx is a triangle with side length 4 inches and height 3.646 inches, the base perimeter can be calculated as 4 + 4 + 4 = 12 inches. The base area can be calculated as 1/2 * base * height = 1/2 * 4 * 3.646 = 7.292 square inches.
The slant height of the pyramid is given as 3.646 inches.
Now we can plug these values into the formula:
Surface Area = 1/2 * 12 * 3.646 + 7.292
Surface Area = 21.936 + 7.292
Surface Area = 29.228 square inches
Rounded to the nearest hundredth, the surface area of Sally's Pyraminx is approximately 29.23 square inches.
What is the surface area of Sally's Pyraminx? Write your answer in decimal form. Round to the nearest hundred. ( 4 in. 4 in. 4 in. ). ( h = 3.646 in. )
1 answer