5.2.1 Ciri-ciri bulatan
Buku teks m/s 81 NOTA https://drive.google.com/file/d/10yNIoIGaNQ0iHYqTPdcJpL1klpJv2JTM/view?usp=sharing LATIHAN https://docs.google.com/forms/d/e/1FAIpQLSd2bn1FmALp7j6kdH8vJoElclAvksumvRXRvnQoEYdfULKB0w/viewform?usp=sf_link