Hai ka :) Tolong bantuin yaa

x*2 = 20*2 - 12*2
x = √ 400 - 144
x = √ 256
x = 16 cm

Luas = 1/2 x 24 x 16 + y
252 = 12 x 16 + y
252/12 = 16 + y
21 = 16 + y
21 - 16 = y
5 = y

z*2 = 12*2 + 5*2
z = √144 +25
z = √ 169
z = 13 cm

a. panjang OC = 16
panjang AC = 16 + 5
= 21
b. keliling = 13 + 13 + 20 + 20
= 66cm