1 Answer

Manish Balodia · Answer 1 · 2022-06-10T02:20:01+0000

Answer:

a)
$p = 88\,cm$ , b)
$p = 24\,cm$ , c)
$p \approx 25.424\,m$ , d)
$p \approx 39.368\,cm$

Explanation:

a) The perimeter is the sum of the three sides of the internal square and the remaining sides of the external rectangle, that is:

$p = 3* 8\,cm + 2* 4\,cm +2* 20\,cm + 16\,cm$

$p = 88\,cm$

b) The perimeter is the sum of the two sides of the internal triangle and the remaining sides of the external rectangle, that is:

$p = 2* 4\,cm + 2* 6\,cm + 4\,cm$

$p = 24\,cm$

c) The perimeter is the sum of the two sides of the circular section and the three sides of the lower rectangle, that is:

$p = (\pi)/(2)* 6\,cm + 8\,cm + 6\,cm + 2\,cm$

$p \approx 25.424\,m$

d) The perimeter is the sum of the external sides of the triangle and rectangle, that is:

$p = 10\,cm + 12\,cm + 12\,cm + 12\,cm - \sqrt{(12\,cm)^(2)-(10\,cm)^(2)}$

$p \approx 39.368\,cm$

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