public class shape

$1$

$//$ details omitted

$\}$

public class circle extends shape

$\}$

$//$ details omitted

$\}$

public class Triangle extends Shape

$\{$

$//$ details omitted

Which of the following are correct?

Circle IS$-$A Shape

Triangle IS$-$A Circle

Triangle IS$-$A Shape

Shape IS$-$A Triangle

Circle IS$-$A Triangle

Shape IS A Circle