Helitaanka wareegga trapezoid: caanaha iyo hawlaha

Daabacaadan, waxaan tixgelin doonaa sida loo xisaabiyo wareegga trapezoid iyo falanqaynta tusaalooyinka xalinta dhibaatooyinka.

Qaacidada Wareegga

Wareegga (P) ee trapezoid wuxuu la mid yahay wadarta dhererka dhinacyadeeda oo dhan.

P = a + b + c + d

• b и d - saldhigga trapezoid;
• a и с – dhinaceeda.

Wareegga trapezoid isosceles

In trapezoid isosceles, dhinacyadu waa siman yihiin (uXNUMXd c), taas oo ah sababta loo yaqaan isosceles. Wareegga waxaa loo xisaabiyaa sidatan:

P = 2a + b + d or P = 2с + b + d

Wareegga trapezoid leydi ah

Si loo xisaabiyo wareegga, isla qaacidada ayaa loo isticmaalaa sida trapezoid-scale.

P = a + b + c + d

Tusaalooyinka hawlaha

Hawsha 1

Soo hel wareegga trapezoid-ka haddii salkiisu yahay 7 cm iyo 10 cm dhinacyaduna yihiin 4 cm iyo 5 cm.

Go'aanka:

Waxaan isticmaalnaa qaacidada caadiga ah, adigoo ku beddelaya dhererka dhinacyada la yaqaan: P u7d 10 cm + 4 cm + 5 cm + 26 cm uXNUMXd XNUMX cm.

Hawsha 2

Wareegga trapezoid isosceles waa 22 cm. Raadi dhererka dhinaca haddii saldhigyada jaantusku yihiin 3 cm iyo 9 cm.

Go'aanka:

Sida aan ognahay, wareegga trapezoid isosceles waxaa lagu xisaabiyaa qaacidada: P = 2a + b + dHalkee а – dhinac.

Dhererkeeda oo lagu dhufto laba waa: 2a = P - b - d = 22 cm - 3 cm - 9 cm = 10 cm.

Sidaa darteed, dhererka dhinacku waa: a = 10 cm / 2 = 5 cm.