Kutsvaga perimeter ye trapezoid: formula uye mabasa

Muchinyorwa chino, tichaona nzira yekuverenga iyo perimeter ye trapezoid uye kuongorora mienzaniso yekugadzirisa matambudziko.

Perimeter Fomula

Iyo perimeter (P) ye trapezoid yakaenzana nehuwandu hwehurefu hwemativi ayo ese.

P = a + b + c + d

• b и d - nheyo ye trapezoid;
• a и с – mativi ayo.

Perimeter ye isosceles trapezoid

Mune isosceles trapezoid, mativi akaenzana (a uXNUMXd c), ndosaka ichinzi zvakare isosceles. Iyo perimeter inoverengerwa seizvi:

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

Perimeter ye rectangular trapezoid

Kuti uverenge perimeter, iyo nzira imwechete inoshandiswa seye scalene trapezoid.

P = a + b + c + d

Mienzaniso yemabasa

Basa 1

Tsvaga perimeter yetrapezoid kana mabhesi ayo ari 7 cm uye 10 cm uye mativi ayo ari 4 cm uye 5 cm.

Sarudzo:

Isu tinoshandisa yakajairwa fomula, tichitsiva iyo inozivikanwa kureba yemativi mairi: P u7d 10 cm + 4 cm + 5 cm + 26 cm uXNUMXd XNUMX cm.

Basa 2

Iyo perimeter ye isosceles trapezoid ndeye 22 cm. Tsvaga kureba kwedivi kana mabhesi emufananidzo ari 3 cm uye 9 cm.

Sarudzo:

Sezvatinoziva, iyo perimeter ye isosceles trapezoid inoverengerwa neformula: P = 2a + b + dapo а – divi.

Kureba kwayo kwakapetwa kaviri ndiko: 2a = P - b - d = 22 cm - 3 cm - 9 cm = 10 cm.

Naizvozvo, kureba kwerutivi ndiko: a = 10cm/2 = 5cm.