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Trapets. Nelinurka, mille üks paar vastaskülgi on paralleelsed ja teine paar vastaskülgi on mitteparalleelsed nimetatakse trapetsiks. alus. haar. haar. alus. Trapetsi paralleelseid külgi nimetatakse trapetsi alusteks. Trapetsi mitteparalleelseid külgi nimetatakse trapetsi haaradeks. D. C.

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Nelinurka, mille üks paar vastaskülgi on paralleelsed ja teine paar vastaskülgi on mitteparalleelsed nimetatakse trapetsiks.
slide3

alus

haar

haar

alus

Trapetsi paralleelseid külgi nimetatakse trapetsi alusteks.

Trapetsi mitteparalleelseid külgi nimetatakse trapetsi haaradeks.

slide4

D

C

A

B

Trapetsi omadus:

Trapetsi haara lähisnurkade summa on 1800.

DAB + ADC = 1800

ABC + BCD = 1800

v rdhaarne trapets

D

C

A

B

Võrdhaarne trapets
  • Trapetsit, mille haarad on võrdse pikkusega nimetatakse võrdhaarseks trapetsiks.

AD =BC

v rdhaarse trapetsi omadus

D

C

B

A

Võrdhaarse trapetsi omadus:

Võrdhaarse trapetsi aluse lähisnurgad (alusnurgad) on võrdsed.

DAB = ABC

ADC = BCD

t isnurkne trapets

D

C

A

B

Täisnurkne trapets
  • Trapetsit, mille üks haar on risti trapetsi alustega nimetatakse täisnurkseks trapetsiks.

DAB = 900