tolong jawab ya... plis

1.luas= 1/2 × phi × r × r
1/2 × 22/7 × 21 × 21 = 693
keliling =phi × jari jari
=22/7 × 21
=66

2.luas = 1/4 × phi × r × r
= 1/4 × 22/7 × 42 × 42
=1.386
keliling=1/4 × phi × d
= 1/4 × 22/7 × 84
= 66
3. luas 1 = p×l
= 14 × 8
= 112
keliling = 2 × (p+l)
= 2 × ( 14 + 8 )
= 2 × 22
= 44

luas 2 = 1/2 × phi × r × r
= 1/2 × 22/7 × 7 × 7
= 77
keliling= phi × r
=22/7 × 7
=22

luas 3 = 1/2 × a × t
=24
keliling= s1 + s2 + s3
= 8 + 6 + 8
= 22
luas gab.= 112+77+24
= 213 cm2
keliling = 44+22+22
= 88 cm

maaf kalau salah