A cikin wannan ɗaba'ar, za mu yi la'akari da dabarar da za ku iya ƙididdige girman ɓangaren yanki, da kuma misalin warware matsalar don nuna aikace-aikacen ta a aikace.
Ƙaddamar da sashin ƙwallon ƙafa
Bangaren ƙwallon ƙwallon ƙafa (ko ɓangaren ƙwallon ƙafa) Wani bangare ne ya kunshi wani yanki mai sihiri da mazugi, koren wanda shine tsakiyar kwandon, kuma tushe shine tushe mai dacewa. A cikin hoton da ke ƙasa, sashin yana inuwa a cikin orange.
- R shine radius na kwallon;
- r shine radius na kashi da mazugi tushe;
- h - tsayin sashi; perpendicular daga tsakiyar tushe na kashi zuwa wani batu a kan sphere.
Formula don gano girman sashin yanki
Don nemo juzu'i na yanki mai siffar zobe, wajibi ne a san radius na sphere da tsayin sashin da ya dace.
Notes:
- idan maimakon radius na kwallon (R) da diamita (d), ya kamata a raba na karshen biyu don nemo radius da ake bukata.
- π zagaye daidai yake da 3,14.
Misalin matsala
An ba da yanki tare da radius na 12 cm. Nemo juzu'in yanki mai zagaye idan tsayin sashin da wannan sashin ya kunsa shine 3 cm.
Magani
Muna amfani da dabarar da aka tattauna a sama, tare da maye gurbinta da ƙimar da aka sani a ƙarƙashin yanayin matsalar:
