Answer:
1. 1,344m²
2. 915cm²
3. 258.5dm²
4. 350mm²
5. 830cm²
Step-by-step explanation:
1. Area of triangle : A=1/2bh
h= 12m ; b=28m
A=1/2(12)(28)
A=1/2(336)
A=168m²
Area of Rectangle : A=L×W
L=42m ; W=28m
A=42×28
A=1,176m²
168m+1,176m= 1,344m
the total area of the figure is 1,344m².
2. Area of Rectangle : A= L×W
for the small rectangle (why I said so?kase po ang square ay may equal sides.)
L= 15cm, W=16cm
for the big one we have,
L=45cm, W=15cm
A=L×W
A= 15×16
A= 240cm²
A=L×W
A=45×15
A=675cm²
240+675= 915.
the total area of the figure is 915cm².
3. Area of rectangle : A=L×W
L=18, W=10
A=L×W
A=18×10
A=180dm²
Area for circle : A= pi r²
pi= 3.14 , r=5
(the width of the rectangle is equal to the diameter of the circle. divide it to two to get the radius)
A=3.14(5)²
A=3.14(25)
A= 78.5dm²
180+78.5= 258.5
The total area of the figure is 258.5dm²
4. Area of Square : A= s²
S= 10mm
A=10²
A= 100mm²
Area of rectangle : A=L×W
L=25, W=18
A=L×W
A=25×18
A=450mm²
450-100= 350
The total area of the figure is 350mm²
5. Area of Trapezoid : A= a + b/2 (h)
a=38 , b= 45, h=20
A= a+b/2(h)
A= 38+45/2(20)
A= 83/2(20)
A= 41.5(20)
A= 830cm²
hope it helps. correct me if im wrong
