Question

Use the net to find the surface area of the regular pyramid.

Answer 1

Answer:

Surface area of regular pyramid by using a formula

surface area = area of base + 1/2 × perimeter of base × slant height.

Answer 2

Answer:

The surface area is $145$ square units.

Step-by-step explanation:

The perimeter of the base is $4(5)$ or $20$ units, and the area of the base is $52$ or $25$ square units. Substitute these values into the formula for the surface area of a pyramid.

$T=\frac{1}{2} pl+B$              Surface area of a regular pyramid

  $=\frac{1}{2} (20)(12)+25$     $P=20,l=12,B=25$    

  $=145$                      Simplify.  

The surface area is $145$ square units.