[" (1) In a triangle "ABC" if tanfee "],[" then: "]

If triangle ABC cong triangle DEF then

In a triangle ' ABC,r_(-)1

In a triangle ABC, if angleA=angleB+angleC , the prove that triangle ABC is a right triangle.

For triangle ABC cong triangle ACB , then

In a triangle ABC, if acosA=bcosB , then the triangle is

In a Delta ABC

Write the converse conradiction and contrapositive of the statement " triangle ABC cong triangle DEF , then1riangle ABC ~ triangle DEF".