Jawaban:

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Penjelasan dengan langkah-langkah:

2) 4 buah (B)

3) 2 (B)

4) Bola (A)

5) Jarak antara puncak kerucut dan pusat lingkaran alas disebut selimut kerucut (D)

6) 18 dan 8 (B)

7) 10 (B)

8) KM (D)

9) Tabung (C)

10) 0 titik sudut, 3 sisi dan 2 rusuk (D)

11) Lp = (2 x L. Alas) + (K. Alas x T. Prisma)

= (2 x (½ x (a + c) x t)) + ((a + b + c + d) x T. Prisma)

= (2 x (½ x (8 + 14) x 10)) + ((8 + 17 + 14 + 10) x 12)

= (2 x (½ x 22 x 10)) + (49 x 12)

= (2 x 110) + 588

= 220 + 588

= 808 cm² (A)

12) Sisi Alas = √L. Alas = √144 = 12 cm

Tinggi Sisi Tegak = √6² + 8² = √36 + 64 = √100 = 10 cm

Lp = L. Alas + L. Sisi Tegak

= (s²) + (4 x (½ x a x t))

= 144 + (4 x (½ x 12 x 10))

= 144 + (4 x 60)

= 144 + 240

= 384 cm² (B)

13) r = d/2 = 14/2 = 7 cm

s = √7² + 24² = √49 + 576 = √625 = 25 cm

Lp = πr (r + s) = 22/7 x 7 (7 + 25) = 22 x 32 = 704 cm² (D)

14) r = d/2 = 21/2 = 10,5 cm

Lp = 4πr² = 4 x 22/7 x 10,5² = 1.386 cm² (C)

15) Sisi Miring Alas = √15² + 20² = √225 + 400 = √625 = 25 cm

Lp = (2 x L. Alas) + (K. Alas x T. Prisma)

= (2 x (½ x a x t)) + ((a + b + c) x T. Prisma)

= (2 x (½ x 20 x 15)) + ((15 + 20 + 25) x 28)

= (2 x 150) + (60 x 28)

= 300 + 1.680

= 1.980 cm² (D)

16) Tinggi Alas = √15² - 12² = √225 - 144 = √81 = 9 cm

Lp = (2 x L. Alas) + (K. Alas x T. Prisma)

324 = (2 x (½ x a x t)) + ((a + b + c) x T. Prisma)

324 = (2 x (½ x 12 x 9)) + ((9 + 12 + 15) x T. Prisma)

324 = (2 x 54) + (36 x T. Prisma)

324 = 108 + (36 x T. Prisma)

324 - 108 = 36 x T. Prisma

216 = 36 x T. Prisma

T. Prisma = 216/36

T. Prisma = 6 cm

V = L. Alas x T. Prisma

= (½ x a x t) x T. Prisma

= (½ x 12 x 9) x 6

= 54 x 6

= 324 cm³ (B)