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Z is a rectangle. Study and use it to answer the questions that follow. Workout the value of x. Workout length of diagonal WY.

Mathematics

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7

13 cm\text{13 cm}

Haya master, hapa kuna masuluhisho ya maswali yako:

1. Tafuta thamani ya xx.

  • Hatua ya 1: Katika mstatili, pande zinazoelekeana ni sawa. Hivyo, urefu wa upande ZY ni sawa na urefu wa upande WX. ZY=WXZY = WX
  • Hatua ya 2: Badilisha misemo ya aljebra kwa urefu wa pande: x+5=2x−2x+5 = 2x-2
  • Hatua ya 3: Kusanya vigezo (xx) upande mmoja na nambari upande mwingine: 5+2=2x−x5+2 = 2x-x 7=x7 = x Thamani ya xx ni 7\boxed{7}.

2. Tafuta urefu wa ulalo WY.

  • Hatua ya 1: Kwanza, kokotoa urefu wa pande za mstatili kwa kutumia x=7x=7:
    • Urefu wa WX (au ZY): WX=2x−2=2(7)−2=14−2=12 cmWX = 2x-2 = 2(7)-2 = 14-2 = 12 \text{ cm}
    • Urefu wa WZ (au XY): WZ=x−2=7−2=5 cmWZ = x-2 = 7-2 = 5 \text{ cm}
  • Hatua ya 2: Katika mstatili, kila pembe ni 90∘90^\circ. Hivyo, pembetatu △WXY\triangle WXY ni pembetatu ya pembe mraba. Tunaweza kutumia kanuni ya Pythagoras kupata urefu wa ulalo WY. WY2=WX2+XY2WY^2 = WX^2 + XY^2
  • Hatua ya 3: Badilisha urefu wa pande WX na XY (ambayo ni sawa na WZ) kwenye kanuni: WY2=(12)2+(5)2WY^2 = (12)^2 + (5)^2 WY2=144+25WY^2 = 144 + 25 WY2=169WY^2 = 169
  • Hatua ya 4: Tafuta mzizi wa mraba wa pande zote mbili ili kupata urefu wa WY: WY=169WY = \sqrt{169} WY=13 cmWY = 13 \text{ cm} Urefu wa ulalo WY ni 13 cm\boxed{\text{13 cm}}.
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