Answer:
120
Step-by-step explanation:
its the same as the angle its across from
The first one because just look which fraction is equivalent
base= 5+h
height= h
area= 1/2bh, so since our area us 18cm^2
therefore 18=1/2*b*h
18*2=(5+h)*h
36=5h+h^2
h^2+5h-36=0 ( for quadratic equation)
h^2+9h-4h-36=0
(h^2+9h)(-4h-36)=0
h(h+9)-4(h+9)=0
(h-4)(h+9)=0
h=4 or h= -9
All these rooms are rectangles so to find the area of the rooms multiply length by width.
Living Room: 5x4 = 20 m²
Kitchen: 4x3 = 12 m²
Dining Room: 4x2 = 8 m²