3 years ago

Find the area of a regular octagon with a side length of 5 cm. Round to the nearest tenth

Mathematics

1 answer:

ddd [48]3 years ago

5 0

Answer:

120.7 cm²

Step-by-step explanation:

2( 1 + √2 ) a² = 2( 1+ √2 ) · 5² ≈ 120.7

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