Ukuthola i-perimeter ye-trapezoid: ifomula nemisebenzi

Kule ncwadi, sizocubungula indlela yokubala i-perimeter ye-trapezoid futhi sihlaziye izibonelo zokuxazulula izinkinga.

I-Perimeter Formula

I-perimeter (P) ye-trapezoid ilingana nesamba sobude bazo zonke izinhlangothi zayo.

P = a + b + c + d

• b и d - isisekelo se-trapezoid;
• a и с – izinhlangothi zayo.

Ipherimitha ye-trapezoid ye-isosceles

Ku-trapezoid ye-isosceles, izinhlangothi ziyalingana (uXNUMXd c), yingakho ibizwa nangokuthi i-isosceles. I-perimeter ibalwa kanje:

P = 2a + b + d or P = 2s + b + d

Ipherimitha ye-trapezoid engunxande

Ukuze ubale umjikelezo, ifomula efanayo isetshenziswa njenge-scalene trapezoid.

P = a + b + c + d

Izibonelo zemisebenzi

Umsebenzi 1

Thola i-perimeter ye-trapezoid uma izisekelo zayo ziyi-7 cm no-10 cm futhi izinhlangothi zayo ziyi-4 cm no-5 cm.

Isinqumo:

Sisebenzisa ifomula evamile, sishintsha ubude bezinhlangothi ezaziwayo kuwo: P u7d 10 cm + 4 cm + 5 cm + 26 cm uXNUMXd XNUMX cm.

Umsebenzi 2

I-perimeter ye-isosceles trapezoid ingama-22 cm. Thola ubude bohlangothi uma izisekelo zesibalo zingama-3 cm no-9 cm.

Isinqumo:

Njengoba sazi, i-perimeter ye-trapezoid ye-isosceles ibalwa ngefomula: P = 2a + b + dkuphi а – side.

Ubude bayo buphindwe kabili yilokhu: 2a = P – b – d = 22 cm – 3 cm – 9 cm = 10 cm.

Ngakho-ke, ubude bohlangothi buyi: a = 10 cm / 2 = 5 cm.