Use the net to find the surface area of the square pyramid. HELPP

A) 72 cm2
B) 156 cm2
C) 260 cm2

C)260 cm2

Step-by-step explanation:

(formula for triangles h*b/2) (8*10/2)4 +(10*10)=260

step-by-step explanation:

this can be solved first with pythagorean theorem, which tells us to square both legs of the triangle and sum it. this will be equal to the square of the hypotenuse.

the hypotenuse is the side "opposite" the 90 degree angle, which is x.

so we can write using pythagorean theorem,

simplifying:

to further simplify this radical, we need to use the property  

thus