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PROBLEME DE MATEMATIC Ă

PROBLEME DE MATEMATIC Ă. D. 1.Dacă ABCD este paralelogram si distanţa de la A la BD este egala cu 4 cm , distanţa de la C la BD este egala cu ? ABCD-paralelogram d(A,BD)=4 cm d(C,BD)=? ABCD-paralelogram= > <D1 <B2 I.U.

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PROBLEME DE MATEMATIC Ă

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  1. PROBLEME DE MATEMATICĂ

  2. D 1.Dacă ABCD este paralelogram si distanţa de la A la BD este egala cu 4 cm , distanţa de la C la BD este egala cu? ABCD-paralelogram d(A,BD)=4 cm d(C,BD)=? ABCD-paralelogram=> <D1 <B2 I.U. <T=90 ;<Q=90 => ADT CQB=>d(C,BD)=d(A,BD) DA CB =>d(C,BD)=4cm C 1 T Q 2 A B

  3. C 2.Demostraţi că dacă ABCD este paralelogram si (AC este bisectoare , atunci ABCD este romb. ABCD-paralelogram (AC-bisectoare ABCD-romb ABCD-paralelogram [AO]-mediană în ABD AC BD={O} => (AC-bisectoare pentru => <BAD => ADB-isoscel=>[AB] [AD] ABCD-paralelogram => ABCD-romb B D O A

  4. 3.Demostraţi că dacă ABCD este trapez isoscel atunci, unchiurile de la bază sunt congruente. ABCD-trapez isoscel (AB DC) <A <B Fie T AB:CT AD AB DC=>AT DC =>ATCD-paralelogram AD CT =><A T1 SEC.CT ATCD-para.=>[AD] [CT] [AD] [BC] =>[CT] [BC]=> CTB-isoscel =><T1 <B ŞI <T1 <A=> < A <B D C A B T

  5. Realizat de : Petreuş Andreea

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