Question

Tolong ya,makasih...

Answer 1

Maaf kalau gambar and tulisan jelek

Answer 2

Karena sebangun maka
pjg sisi atas B / pjg sisi atas A = pjg alas B / pjg alas A
12 / 8 = pjg alas B / 12
Pjg alas B = 12 × 12 / 8 = 18

Pjg sisi miring B / pjg sisi miring A = pjg sisi atas B / pjg sisi atas A
pjg sisi mirig B / 5 = 12 / 8
Pjg sisi miring B = 12 × 5 / 8 = 15/2
Dngan phytagoras dpt dicari tinggi trapesium B
t^2 = (15/2)^2 - 6^2
= 225/4 - 36 = (225-144)/4 = 81/4
t = akar 81/4 = 9/2
L trapesium B = (9/2)(12 + 18) /2
= 15 × 9 / 2 = 135 / 2 = 67,5 cm^2

Semoga membantu dan mudah dipahami
#FunWithMath