keliling bangun disamping persegi 14 cm setengah lingkaran diameternya 20 cm

p = 20cm
l = 14cm
d = 14cm

kll gabungan = 2p+L+ kll ½ lingkaran

kll setengah lingkaran = ½πd
½×22/7×14 = 22cm

kll gabungan = (2×20)+14+22
40+14+22 = 76cm

semoga membantu

keliling 1/2 lingkaran =
[tex] \frac{1}{2} \times \pi \times \: d = \frac{1}{2} \times \frac{22}{7} \times 14 = 22cm {}^{2} [/tex]
22cm^2 + 20 +20 +14 =76cm^2