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What is the perimeter of the shape shown in the image?

Mathematics

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Answer

56 sm2\text{56 sm}^2

Step-by-step solution

6 steps

Hapa kuna hatua za kutafuta eneo la umbo la 'E':

Umbo hili linaweza kugawanywa katika mstatili mmoja wima upande wa kushoto na mstatili tatu za mlalo upande wa kulia.

  1. Tafuta vipimo vya mstatili mrefu wa wima upande wa kushoto.

    Urefu wa jumla wa umbo ni 10 sm10 \text{ sm}.
    Upana wa jumla wa umbo ni 8 sm8 \text{ sm}.
    Urefu wa ndani wa pau za mlalo ni 6 sm6 \text{ sm}.
    Hivyo, upana wa mstatili wa wima ni upana wa jumla - urefu wa ndani wa pau za mlalo.

    Upana wa wima=8 sm−6 sm=2 sm\text{Upana wa wima} = 8 \text{ sm} - 6 \text{ sm} = 2 \text{ sm} Urefu wa wima=10 sm\text{Urefu wa wima} = 10 \text{ sm}
  2. Kokotoa eneo la mstatili wa wima.

    Eneowima=urefu×upana=10 sm×2 sm=20 sm2\text{Eneo}_{\text{wima}} = \text{urefu} \times \text{upana} = 10 \text{ sm} \times 2 \text{ sm} = 20 \text{ sm}^2
  3. Tafuta vipimo vya mstatili mmoja wa mlalo (kuna tatu zinazofanana).

    Urefu wa kila mstatili wa mlalo ni 6 sm6 \text{ sm}.
    Upana (au kimo) wa kila mstatili wa mlalo ni 2 sm2 \text{ sm} (kama inavyoonyeshwa kwenye picha).

  4. Kokotoa eneo la mstatili mmoja wa mlalo.

    Eneomlalo mmoja=urefu×upana=6 sm×2 sm=12 sm2\text{Eneo}_{\text{mlalo mmoja}} = \text{urefu} \times \text{upana} = 6 \text{ sm} \times 2 \text{ sm} = 12 \text{ sm}^2
  5. Kokotoa eneo la mstatili zote tatu za mlalo.

    Kuna mstatili tatu za mlalo, hivyo:

    Eneomlalo tatu=3×12 sm2=36 sm2\text{Eneo}_{\text{mlalo tatu}} = 3 \times 12 \text{ sm}^2 = 36 \text{ sm}^2
  6. Jumlisha eneo la mstatili wa wima na eneo la mstatili zote tatu za mlalo kupata eneo kamili la umbo la 'E'.

    Eneo Jumla=Eneowima+Eneomlalo tatu=20 sm2+36 sm2=56 sm2\text{Eneo Jumla} = \text{Eneo}_{\text{wima}} + \text{Eneo}_{\text{mlalo tatu}} = 20 \text{ sm}^2 + 36 \text{ sm}^2 = 56 \text{ sm}^2

    Eneo kamili la umbo la 'E' ni 56 sm2\text{56 sm}^2.

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