Answer:
1.A=108cm²
2.A≈235.5cm²
3.A=32cm²
Step-by-step explanation:
1. rectangle - triangle
rectangle
A=lxw
A=16cmx12cm
A=192cm²
triangle
A=1/2bh
A=1/2(14cm)(12cm)
A=1/2(168cm²)
A=84cm²
rectangle - triangle=shaded region
A=192cm²-84cm²
A=108cm²
2.square-circle
square
A=S.S
A=10cmx10cm
A=100cm²
circle
A=πr²
A=π(5cm)²
A=25cm²π
square-circle=shaded region
A=100cm²-25cm²π
A=75cm²π
A=75cm²(3.14)
A≈235.5cm²
3.Trapezoid- rectangle
Trapezoid
A=1/2(b1+b2)(h)
A=1/2(12cm+20cm)(8cm)
A=1/2(32cm)(8cm)
A=(16cm)(8cm)
A=128cm²
Rectangle
A= lxw
A=12cmx8cm
A=96cm²
Trapezoid- rectangle=shaded region
A=128cm²-96cm²
A=32cm²
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Answers & Comments
Answer:
1.A=108cm²
2.A≈235.5cm²
3.A=32cm²
Step-by-step explanation:
1. rectangle - triangle
rectangle
A=lxw
A=16cmx12cm
A=192cm²
triangle
A=1/2bh
A=1/2(14cm)(12cm)
A=1/2(168cm²)
A=84cm²
rectangle - triangle=shaded region
A=192cm²-84cm²
A=108cm²
2.square-circle
square
A=S.S
A=10cmx10cm
A=100cm²
circle
A=πr²
A=π(5cm)²
A=25cm²π
square-circle=shaded region
A=100cm²-25cm²π
A=75cm²π
A=75cm²(3.14)
A≈235.5cm²
3.Trapezoid- rectangle
Trapezoid
A=1/2(b1+b2)(h)
A=1/2(12cm+20cm)(8cm)
A=1/2(32cm)(8cm)
A=(16cm)(8cm)
A=128cm²
Rectangle
A= lxw
A=12cmx8cm
A=96cm²
Trapezoid- rectangle=shaded region
A=128cm²-96cm²
A=32cm²