Tse ka Hare
Sehloohong sena, re tla nahana ka tlhaloso le thepa ea bohareng ba khutlotharo e nepahetseng e huleloang ho hypotenuse. Re tla boela re sekaseke mohlala oa ho rarolla bothata ho kopanya litaba tsa theory.
Ho khetholla bohareng ba khutlotharo e nepahetseng
E bohareng ke karolo ya mola e kopanyang hodimo ya kgutlotharo le ntlha e bohareng ya lehlakore le fapaneng.
khutlotharo e nepahetseng ke khutlotharo eo ho eona e 'ngoe ea li-angles e nepahetseng (90°) 'me tse ling tse peli li le bohale (<90°).
Thepa ea bohareng ba khutlotharo e nepahetseng
Thepa 1
Median (AD) khutlotharo e nepahetseng e huloang ho tloha vertex ea khutlo e nepahetseng (∠LAC) ho hypotenuse (BC) ke halofo ea hypotenuse.
- BC = 2AD
- AD = BD = DC
Phello: Haeba bohareng bo lekana le halofo ea lehlakore leo le huleloang ho lona, joale lehlakore lena ke hypotenuse, 'me khutlotharo e le lehlakoreng le letona.
Thepa 2
Bohareng bo huleloang ho hypotenuse ea khutlotharo e nepahetseng e lekana le halofo ea motso oa lisekoere oa kakaretso ea lisekoere tsa maoto.
Bakeng sa khutlotharo ea rona (sheba setšoantšo se kaholimo):
E latela ho tloha le Thepa 1.
Thepa 3
Bohareng bo theohileng holim'a hypotenuse ea khutlotharo e nepahetseng e lekana le radius ea selikalikoe se pota-potileng khutlotharo.
Tseo. BO ke bobeli bohareng le radius.
Hlokomela: E boetse e sebetsa ho kgutlotharo e nepahetseng, ho sa tsotelehe mofuta wa kgutlotharo.
Mohlala oa bothata
Bolelele ba median e huleloang ho hypotenuse ea khutlotharo e nepahetseng ke 10 cm. 'Me leoto le leng ke 12 cm. Fumana pherimitha ea kgutlotharo.
tharollo
The hypotenuse ea khutlotharo, ka tsela e latelang ho tloha Thepa 1, habeli bohareng. Tseo. e lekana le: 10 cm ⋅ 2 = 20 cm.
Re sebelisa theorem ea Pythagorean, re fumana bolelele ba leoto la bobeli (re le nka joalo ka "B", leoto le tummeng - bakeng sa “ho”, hypotenuse - bakeng sa "Le"):
b2 =c2 - le2 = 202 - 122 = 256.
Ka hona, b = 16cm.
Hona joale re tseba bolelele ba mahlakore 'ohle' me re ka bala palo ea palo:
P△ = 12 cm + 16 cm + 20 cm = 48 cm.