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Sagot :
Answer:
c. [tex]\sf area \ of \ octagon = 173.82 \ ft^2[/tex]
Explanation:
[tex]\sf area \ of \ octagon = 2(1+\sqrt{2} )a^2[/tex]
Here "a" refers to side length.
using this formula:
[tex]\hookrightarrow \sf area \ of \ octagon = 2(1+\sqrt{2} )(6)^2[/tex]
[tex]\hookrightarrow \sf area \ of \ octagon = 173.82 \ ft^2[/tex]
Solution:
It should be noted:
- Area of regular octagon: 2(1 + √2)x² (x = side)
Substitute the side length into the formula.
- 2(1 + √2)x²
- => 2(1 + √2) × 6²
Simplify the distributive property.
- => 2(1 + √2)36
- => 72(1 + √2)
- => 72 + 72√2
Simplify 72√2 using a calculator.
- => 72 + 101.82
Add if needed.
- => 173.82 ft²
Looking at the options, it is said that option C is correct as 173.8 and 173.82 are approximate numbers.
Option C is correct.
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