Question

tolong di bantu...!!​

Answer 1

a. panjang AE = 5 cm

13²-12² = AE²

25 = AE²

AE = 5

b. 13+11+13+5+11+5t = 58

c. ½ . (a+b) . t

½ . 12 . (11+21)

192 cm²

Answer 2

Jawab:

A) AE = 5 cm

B) K = 58 cm

C) L = 192 cm^2

Penjelasan dengan langkah-langkah:

A) Sisi miring = √(sisi tegak^2 + sisi alas^2)

Sisi miring = 13 cm

Sisi tegak = 12 cm

Sisi alas = AE (belum diketahui)

AE = √(sisi miring^2 - sisi tegak^2)

AE = √(13 cm^2 - 12 cm^2)

AE = √169 cm - 144 cm

AE = √25 cm

AE = 5 cm

B) Keliling Trapesium = 2 x sisi miring + garis AB + garis DC

K = 2 x 13 cm + 5 cm + 11 cm + 5 cm + 11 cm

K = 26 cm + 5 cm + 11 cm + 5 cm + 11 cm

K = 31 cm + 11 cm + 5 cm + 11 cm

K = 42 cm + 5 cm + 11 cm

K = 47 cm + 11 cm

K = 58 cm

C) Luas Trapesium = 1/2 x (AB + CD) x t

AB = 5 cm + 11 cm + 5 cm = 21 cm

CD = 11 cm

t = 12 cm

L = 1/2 x (21 cm + 11 cm) x 12 cm

L = 1/2 x 32 cm x 12 cm

L = 384 cm^2/2

L = 192 cm^2

semoga sukses dan semoga membantu