Kupeza kozungulira kwa lalikulu: chilinganizo ndi ntchito

M'buku lino, tiwona momwe tingawerengere mtunda wa lalikulu ndikusanthula zitsanzo zothetsera mavuto.

Fomula ya Perimeter

Pa mbali kutalika

Kuzungulira (P) ya sikweya ndi yofanana ndi kuchuluka kwa utali wa mbali zake.

P = a + a + a + a

Popeza mbali zonse za sikweya ndizofanana, chilinganizochi chikhoza kufotokozedwa ngati chinthu:

P = 4 ⋅ a

Pafupi ndi kutalika kwa diagonal

Malo ozungulira (P) a square ndi ofanana ndi kutalika kwa diagonal ndi nambala 2√2:

P = ⋅ 2√2

Njirayi imachokera ku chiŵerengero cha kutalika kwa mbali (a) ndi diagonal (d) ya lalikulu:

d = a√2.

Zitsanzo za ntchito

Ntchito 1

Pezani wozungulira wa lalikulu ngati mbali yake ndi 6 cm.

Kusankha:

Timagwiritsa ntchito njira yomwe mtengo wambali umakhudzidwa:

P = 6 cm + 6 cm + 6 cm + 6 cm = 4 ⋅ 6 cm = 24 cm.

Ntchito 2

Pezani m'mphepete mwa sikweya yomwe diagonal yake ndi √2 onani

1 Yankho:

Poganizira za mtengo wodziwika kwa ife, timagwiritsa ntchito njira yachiwiri:

P = √2 cm ⋅ 2√2 = 4 masentimita.

2 Yankho:

Fotokozani kutalika kwa mbali molingana ndi diagonal:

a =d/√2 = √2 cm/√2 = 1 masentimita.

Tsopano, pogwiritsa ntchito fomula yoyamba, timapeza:

P = 4 ⋅ 1 cm = 4 cm.