nomor 1

AG = √(13²-12²)

AG = √(169-144)

AG = √25

AG = 5

AC = 10

Lp = (2.½.10.12) + (12. [13+13+10])

Lp = 120 + 432

Lp = 552 cm² ✔️

V = ½. 10. 12. 12

V = 720 cm³ ✔️

nomor 2

FG = √(12²+9²)

FG = √(144+81)

FG = √225

FG = 15

Lp = (2.½.12.9) + 8.(9+12+15)

Lp = 108 + 288

Lp = 396 cm² ✔️

V = ½. 12. 9. 8

V = 432 cm³ ✔️

nomor 3

JL = √(16²+12²)

JL = √400

JL = 20

Lp = (2.½. 12.16) + 20. (16+12+20)

Lp = 192 + 960

Lp = 1152 cm² ✔️

v = ½. 12. 16. 20

v = 1920 cm³ ✔️

nomor 4

Lp = (2.½. 16. 6) + 22. (16+10+10)

Lp = 96 + 792

Lp = 888 cm² ✔️

v = ½. 16. 6. 22

v = 1056 cm³ ✔️

nomor 5

AC = √(12²+5²)

AC = √169

AC = 13

Lp = (2.½. 5. 12) + 10. (5+12+13)

Lp = 60 + 300

Lp = 360 cm² ✔️

v = ½. 5. 12. 10

v = 300 cm³ ✔️

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Rumus

• Lp = 2 La + Ka.t
• v = La. t

La = luas alas

Ka = keliling alas

jika alas berbentuk segitiga, maka

• La = ½. a. t
• Ka = a + b + c

________

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