no 1=mencari luas aja.. no 2=luas dan keliling ya...... Tolong jawan ya

1. L 1 = s x s = 20 x 20 = 400 cm
L 2 = 1/2 x a x t = 1/2 15 x 20 = 150 cm
L 3 = r = 1x2 x D = 1/2 x 20
r = 10 cm
π x r xr = 3,14 x 10 x 10 = 314
L 1/2 lingkaran = 1/2 x 314 = 157 cm
luas total = 400 + 150 + 157 = 707 cm
2 . L 1 = pxl = 20 x 14 = 280 cm
L 2 = π x r x r = 22/7 x 7 x 7 = 154 cm
L 1/2 lingkaran = 1/2 x 154 cm = 77 cm
L total = 280 + 77 = 357 cm
K 1/2 lingkaran = 1/2 x π x D = 1/2 x 22/7 x 14 =1/2 x 44 = 22 cm
k total = 22 + 20 + 14 + 20 = 76 cm
semoga bermanfaat