Question

Tolong pakai caranya juga ya:)

Answer 1

Verified answer

CD / BC = EF / FG
CD / 30 = 10 / 20
CD = 1/2 x 30
CD = 15 cm

AB / BC = AG / FG
AB / 30 = 22 / 20
AB = 22/20 x 30
AB = 33 cm

AD² = BC² - (AB - CD)²  
       = 30² - (33 - 15)²
       = 30² - 18²
       = 900 - 324
       = 576
AD = √576
      = 24 cm

Luas trapesium
= 1/2 x (AB + CD) x AD
= 1/2 x (33 + 15) x 24
= 1/2 x 48 x 24
= 576 cm²

Jawaban D

Answer 2

Diket
ABCD = I
AGFE = II

DC I / EF II = CB I/FG II
DC / 10 =30/20
20.DC = 10.30
DC = 300 / 20
DC = 15 cm

AB I/AG II =CB I / FG II
AB I/22 = 30/20
AB. 20 = 22.30
AB = 660 : 20
AB = 33

AD ² =BC² - (AB -CD) ²
AD² =30² - 18²
AD² = 900- 324
AD =√576
AD = 24

LUAS ABCD
(a + b) x t /2
(15+33) x 24 /2
48 x 12= 576cm²