keliling bangun gabungan diayas adalah

Keliling = 25+25+40+(1/2.π.d)
=90+(1/2.3.14 x 20)
=90+31.4= 121.4cm(d)

=25+25+½ πd+40
=(25+25)+½3,14x20+40
=50+31,4+40
=121,4 cm
=D
semoga bermanfaat☺