Skill: Calculate the surface area of a pyramid

44.84

Step-by-step explanation:

The formula for this is lw + l √(w/2)^2 + h^2 + w * √(l/2)^2 = h^2

After that, you just input the values to get a total of 44.84 inches

10: 44.84

11: 149.84

Step-by-step explanation:

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl