tolong d jawab secepatnya

23.) luas trapesium = ½ x (a + c) x tinggi
= ½ x 20 x 8
= 80 cm²

2y + 3y = 180
5y = 180
y = 180/5
y = 36

x + 3y = 180
x + 3(36) = 180
x + 108 = 180
x = 180 -108
x = 72

x + y = 72 + 36 = 108



23. mencari tinggi 
= √10² - 6²
= √100 - 36
= √64
= 8 cm
 
luas trapesium
= 1/2 x jumlah sisi sejajar x t
= 1/2 x (13 +7) x 8
= 1/2 x 20 x 8
= 80 cm²