Twelve cubes stacked in this figure part a: what is its surface area

36 square units

Step-by-step explanation:

well the surface area is:

let's say that the surface of a cube is 1 squared units

so in the figure we have the faces:

up (blue)

down (not seen)

front (green)

back (not seen)

left (yellow)

right (not seen)

so the are of the blue is 6 and also is the down area

the area of the front is 6 and also is the back area

the area of the left is 6 and also the right area

so we have

square units

180

step-by-step explanation:

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer