The present shown below is a cube.
Find the surface area of the present.
cm
20 cm
20 cm
20 cm

Step-by-step explanation:

Ok so to find the surface area of a cube is actually quite simple:

All of the cubes faces have the same area and the surface area is simply the total area of all of the cubes faces.

So to calculate this we can simply multiply the area of one face by the number of total faces (6)

The area of one face is 20 x 20 = 400

The surface area of the cube is: 400 x 6 =

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

table 3 represents a direct variation function. : )