M'buku lino, tiwona momwe tingawerengere kuzungulira kwa makona atatu ndikusanthula zitsanzo za kuthetsa mavuto.
Fomula ya Perimeter
Kuzungulira (P) ya makona atatu aliwonse ndi ofanana ndi kuchuluka kwa utali wa mbali zake zonse.
P = a + b + c
Kuzungulira kwa makona atatu a isosceles
Makona atatu a isosceles ndi makona atatu omwe mbali zake ziwiri ndizofanana (tiyeni tiwatenge ngati b). Mbali a, okhala ndi utali wosiyana ndi a m’mbali mwake, ndiwo maziko ake. Choncho, perimeter ikhoza kuwerengedwa motere:
P = ndi +2b
Kuzungulira kwa makona atatu ofanana
Kokonati yofanana kapena yakumanja imatchedwa, momwe mbali zonse ndi zofanana (tiyeni titenge ngati a). Kuzungulira kwa chiwerengerocho kumawerengedwa motere:
PA = 3a
Zitsanzo za ntchito
Ntchito 1
Pezani wozungulira wa makona atatu ngati mbali zake ndi zofanana: 3, 4 ndi 5 cm.
Kusankha:
Timalowetsa kuchuluka komwe kumadziwika ndi vutolo mu fomula ndikupeza:
P=3cm+4cm+5cm=12cm.
Ntchito 2
Pezani wozungulira wa makona atatu a isosceles ngati maziko ake ndi 10 cm ndipo mbali yake ndi 8 cm.
Kusankha:
Monga tikudziwira, mbali za makona atatu a isosceles ndi ofanana, choncho:
P = 10 cm + 2 ⋅ 8 cm = 26 cm.