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Rina8888 [55]
3 years ago
13

I need this help me pls

Mathematics
2 answers:
Kisachek [45]3 years ago
8 0

Answer:

\boxed{\sf Area \ of \ regular \ octagon \ (A) = 482 \ cm^2}

Given:

Side length (s) = 10 cm

To Find:

Area of regular octagon (A)

Step-by-step explanation:

Area of regular octagon is given by the following formula:

\boxed{ \bold{A = 2(1 + \sqrt{2})s^2}}

By substituting value of s in the formula we get:

\sf \implies A = 2(1 +  \sqrt{2} ) \times  {(10)}^{2}  \\  \\ \sf \implies A = 2(1 +  \sqrt{2} ) \times 100 \\  \\ \sf \implies A = 2(1 + 1.41) \times 100 \\  \\ \sf \implies A = 2(2.41) \times 100 \\  \\ \sf \implies A = 4.82 \times 100 \\  \\ \sf \implies A = 482 \:  {cm}^{2}

\therefore

Area of regular octagon (A) = 482 cm²

Paladinen [302]3 years ago
6 0

Answer:

30 cm^2 approximately

Step-by-step explanation:

The formula for calculating the area of a octagon is 2 (1 + √2) x^2 (x : side length)

2 + 2√2 × 100 = 30 cm^2 approximately

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