Asquare pyramid is shown below:

what is the surface area of the pyramid?

a.11.69 square feet
b.3.29 square feet
c.7.49 square feet
d.2.24 square feet

A.11.69 square feet

Step-by-step explanation:

To calculat ethe surface area of a pyramid you only have to sum of all the areas of the faces and the base.

To calculate the area of the faces of the pyramid you just have to calculate the area of a triangle:

= = 2.8 ft

You have 4 faces on a square pyramid so the area of one face by the number of faces would be:

2.8 ft* 4= 11.2 ft

To this you just add the area of the base, whis is calculated with the formula to calculate a square´s area:

A= L*L= .7*.7= .49

You just add the area of the base with the area of the base:

At= 11.2 ft+ .49ft= 11.69 ft

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet