Henri built a lantern in the shape of a square pyramid. he wants to cover the entire pyramid with fabric. how much fabric will he need?

The amount of fabric needed to cover the pyramid is .

Step-by-step explanation:

Given, the lantern is in the shape of a square pyramid. And the lantern has to be covered by a fabric. So, the amount of fabric needed to cover the lantern can be calculated by the following formula,

where p is the perimeter of the base of the pyramid and l is the slant height.

Since, it is given that it is a lantern, the area to be covered with the fabric is its L.S.A (Lateral Surface Area) leaving the base where the lamp is lit. So, the L.S.A of the pyramid is equal to the amount of fabric required to cover the lantern.  

i think it is c, not positive though

step-by-step explanation:

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm