Please help me! I don't understand it :(

Step-by-step explanation:

Area = l x w

180 = 15 x w

180/15 = w

1.w = 12 meters

wallpaper

2. 2 (15x3) + 2(12x3) = 162 square meters

one meter border 12 + 12 + 15 + 15 = 54

3. take this away from the area  180 - 54 = 126

4. kitchen perimeter = 5 + 13 + 12 = 30

5. area of triangle = 1/2 b h = 1/2(5 x 12) = 30 square meters of tile

assume ceilings are 3 m tall as in the living room

(5x3) + (12x3) + (13x3) = w - walls to be covered

15 + 35 + 39 = 90 divide by 5 square meters per can of paint

6. 18 cans of paint

7. 18 x 16 = 288 square meters

sss (side, side, side)

sas (side, angle, side)

asa (angle, side, angle)

aas (angle, angle, side)

hl (hypotenuse, leg)

the two may have that, even a breakdown is probably offered