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Tafuta thamani ya d, ikiwa AB ni mstari mnyofu
Mathematics
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4 stepsTambua aina ya poligoni na pembe zilizotolewa.
Poligoni hii ina pande 5, kwa hivyo ni pentagoni.
Mstari AB ni mstari mnyoofu.
Pembe ya nje upande wa kushoto chini ni .
Pembe za ndani zilizobaki ni , , na .
Kutokana na alama sawa za pembe za nje chini, tunadhania pembe ya nje upande wa kulia chini pia ni .Kokotoa pembe za ndani za pentagoni.
- Pembe ya ndani (chini kushoto): .
- Pembe ya ndani (juu kushoto): .
- Pembe ya ndani (juu katikati): .
- Pembe ya ndani (juu kulia): .
- Pembe ya ndani (chini kulia): .
Tumia kanuni ya jumla ya pembe za ndani za poligoni.
Kwa poligoni yenye pande , jumla ya pembe za ndani ni .
Kwa pentagoni ():
Jumla ya pembe za ndani .Tengeneza mlinganyo kwa kutumia jumla ya pembe za ndani na utatue kwa .
Thamani ya ni .
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