Answer:
1. 48cm²
Solution:
A= l x w
A= 8cm x 6cm
A= 48cm²
2. 163.13m²
A= πr(r + √(h²+r²))
A= (3.14)(5m) (5m + √((5m)²+(2m)²))
A= (15.7m) (5m + √(25m²+4m²))
A= (15.7m) (5m + √29m²)
A= (15.7m) (5m + 5.39m)
A= (15.7m) (10.39m)
A= 163.13m²
3. 50.24cm²
A= πr²
A= (3.14)(4cm)²
A= (3.14)(16cm²)
A= 50.24cm²
4. 121 ft²
A= ab + 2(½bh) + 2(½ah)
A= (10ft)(3ft) + 2(½(3ft)(7ft)) + 2(½(10ft)(7ft))
A= 30ft² + 2(10.5ft²) + 2(35ft²)
A= 30ft² + 21ft² + 70ft²
A= 121ft²
5. 18cm²
A=½bh
A= ½(4cm)(9cm)
A= ½(36cm²)
A= 18cm²
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Answers & Comments
Answer:
1. 48cm²
Solution:
A= l x w
A= 8cm x 6cm
A= 48cm²
2. 163.13m²
Solution:
A= πr(r + √(h²+r²))
A= (3.14)(5m) (5m + √((5m)²+(2m)²))
A= (15.7m) (5m + √(25m²+4m²))
A= (15.7m) (5m + √29m²)
A= (15.7m) (5m + 5.39m)
A= (15.7m) (10.39m)
A= 163.13m²
3. 50.24cm²
Solution:
A= πr²
A= (3.14)(4cm)²
A= (3.14)(16cm²)
A= 50.24cm²
4. 121 ft²
Solution:
A= ab + 2(½bh) + 2(½ah)
A= (10ft)(3ft) + 2(½(3ft)(7ft)) + 2(½(10ft)(7ft))
A= 30ft² + 2(10.5ft²) + 2(35ft²)
A= 30ft² + 21ft² + 70ft²
A= 121ft²
5. 18cm²
Solution:
A=½bh
A= ½(4cm)(9cm)
A= ½(36cm²)
A= 18cm²