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Mathematics

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Answer

15 cm\text{15 cm}

Step-by-step solution

6 steps
  1. Tambua kuwa pembetatu hii ni pembetatu ya pembe mraba (right-angled triangle) kwa sababu ina alama ya pembe mraba.

    Ili kupata urefu wa upande xx, tutatumia Theorem ya Pythagoras.
    Theorem ya Pythagoras inasema: a2+b2=c2a^2 + b^2 = c^2, ambapo aa na bb ni urefu wa pande fupi, na cc ni urefu wa hypotenuse (upande mrefu zaidi).

  2. Badilisha thamani zilizopewa kwenye fomula.

    Tuna a=9a = 9 cm na b=12b = 12 cm, na c=xc = x.

    92+122=x29^2 + 12^2 = x^2
  3. Kokotoa miraba ya namba.

    81+144=x281 + 144 = x^2
  4. Jumlisha namba hizo.

    225=x2225 = x^2
  5. Tafuta mzizi wa mraba wa pande zote mbili ili kupata xx.

    225=x2\sqrt{225} = \sqrt{x^2} 15=x15 = x
  6. Andika jibu la mwisho na vitengo vyake.

    x=15 cmx = 15 \text{ cm}

    Jibu la mwisho ni:
    15 cm\text{15 cm}

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