Question

Please help me with the question below (also please explain).

Answer 1

126cm²

Explanation:

1st of all, identified how many surface does the green one have.

So it have 2 triangle on its side, 1 rectangle on the left side, 1 rectangle at bottom and 1 rectangle on right side.

Area of 2 triangle:

`2 * ( (1 )/(2) * 4 * 6)`

`2 * (12)`

`24cm {}^(2)`

Area for left side rectangle (behind):

`4 * 6`

`24cm {}^(2)`

Area for bottom rectangle:

`6 * 6`

`36cm {}^(2)`

Area for right side rectangle (slend):

`6 * 7`

`42cm {}^(2)`

So the total of surface area for the green one is:

`24cm { }^(2) + 24cm {}^(2) + 36cm {}^(2) + 42cm {}^(2)`

`126cm {}^(2)`