no 10 tolong dijawab..thanks

Diameter = sisi miring => gunakan phytagoras

d² = 12² + 16² = 400
d = 20

busur = 1/2 lingkaran = 1/2 π d = 1/2 * 22/7 * 20 = 31,4

Keliling = 16 + 12 + 31,4 = 59,4