pls help , also pls serious answer
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Answer:
Given diameter:
A = 1/4πd²
Given radius:
A = πr²
✔️ What is it
1. A = 1/4(3.14)(8cm)²
= 1/4(3.14)(64cm²)
= 1/4 × 200.96cm²
= 200.96cm²/4
A = 50.24cm²
2. A = (3.14)(5cm)²
= (3.14)(25cm²)
A = 78.5cm²
V. Evaluation
A.
1. A = 1/4(3.14)(4cm)²
= 1/4(3.14)(16cm²)
= 1/4 × 50.24cm²
= 50.24cm²/4
A = 12.56cm²
2. A = (3.14)(5cm)²
= (3.14)(25cm²)
A = 78.5cm²
3. A = 1/4(3.14)(6cm)²
= 1/4(3.14)(36m²)
= 1/4 × 113.04m²
= 113.04m²/4
A = 28.26m²
4. A = (3.14)(4.5m)²
= (3.14)(20.25m²)
A = 63.59m²
5. A = 1/4(3.14)(3m)²
= 1/4(3.14)(9m)²
= 1/4 × 28.26m²
= 28.26m²/4
A = 7.07m²
B.
V = lwh
= (12cm)(7cm)(4cm)
= (84cm²)(4cm)
V = 336cm³