Tolong kak pusing ngerti nya tolong di bantu​

Jawab:

1. Lp = 864

2. Lp =  21760

3. Lp = 12320

4. Lp = 14208

Penjelasan dengan langkah-langkah:

1. Lp = 6.r.r = 6.12.12 = 864

2. Lp = 2 . (p.l + p.t + l.t) =  2 . (12.8 + 12.10 + 8.10) =  21760

3. Lp = π.r.r.t = 22/7 . 14.14.20 = 12320

4. Lp = L_alas + 4.L_segitiga = 12.12 + 4.1/2.12.16 = 14208