Question

A área de um trapézio e de 39m. A base maior mede 17 m e a altura e 3 m.qual e a medida da base menor

Answer 1

(Base maior + Base menor ).h /2=Área

se substituir os valores vc terá: (17+x).3/2=39

                                                   3.17+3.x/2=39

                                                    51+3.x=39.2

                                                     51+3.x=78

                                                     3.x=78-51

                                                     3.x=27

                                                     x=27/3

                                                     x=9