Plis jawab yang nomer 31 sampai 25dengan caranya juga​

31. BD = √13²-5²=√169-25=√144=12 cm

CD = 12 : 2 = 6 cm

ED = EA – AD = 13-5 = 8 cm

maka EC = √CD + ED

= √6²+8² = √36+64=√100=10 cm

32. l²= p² – (R-r)²

= 17² – (11.5-3,5)²

= 289-64 = 225

l = √225 = 15 cm

33.V = 1,5 x 3 x 2 = 9 m³

= 9 m³ x 1/3 = 3 m³ = 3000 dm³ = 3000 ltr

34. 8 x 176 = 1.408

6 x 175 = 1.050

1.408 – 1.050 = 358

rata2 yg 2 org = 358 : 2 = 179 cm