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Answer:
Explanation:
Radius is the half of the diameter = r=d/2
Area's Formula:
1.
d=10 ; r=10/2=5
⇒ Bigger circle - Small Circle
⇒ πR² - πr²
⇒ π(5)²-π(3)²
⇒ 25π - 9π
⇒ 16π m² ≈ 50.256 m²
2.
Diameter and Radius for Small Circle: d=12 ; r=12/2=6
Diameter for 2 small circle: d = 6
⇒ Big Semi Circle - 2 Small Semi Circle
⇒ 1/2 (π)(6)² - 1/2(π/4(6)²)(2)
⇒ 18π - 9π
⇒ 9 dm² ≈ 28.274 dm²
3.
⇒ Big Square - 4 Small Square
⇒ (8·8) - 4(2·2)
⇒ 64 - 16
⇒ 48 dm²
4.
d=10 ; r=d/2 = 5
⇒ Square - Circle
⇒ (10·10) -π(5)²
⇒ 100-25π
⇒ 21.46 in²
5.
⇒ Triangle - Rectangle
⇒ 1/2 (7)(6) - (4·2)
⇒ 21 - 8
⇒ 13 dm²
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Step-by-step explanation:
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