P=92.1cm
Объяснение:
AB=45.2cm
BC=(AB-15.5)=45.2-15.5=29.7cm
AC=(BC-12.8)=29.7-12.8=16.9cm
P(abc)=45.2+29.7+16.9=92.1cm
P=92.1cm
Объяснение:
AB=45.2cm
BC=(AB-15.5)=45.2-15.5=29.7cm
AC=(BC-12.8)=29.7-12.8=16.9cm
P(abc)=45.2+29.7+16.9=92.1cm