The given statement is acute angles have measures less than 90

The conditional if-then form is

Conditional:        If the angles are acute, then they have measures less than 90.

                            The conditional statement is true.

Converse:            If the angles have measures less than 90,then they are acute angles.

                             The converse is true.

Inverse:               If the angles are not acute, then they do not have measures less than 90.

                             The inverse is true.

Contrapositive:  If the angles do not have measures less than 90,then they are not acute angles.

                            The contrapositive is true.