Tolong bantuannya sebentar lagi di kumpulkan

21)
luas trapesium =
1/2 (14+9) x 6 = 69cm²

luas persegi panjang = pxl
= 6×4 = 24

luas arsir = 69 – 24 = 45cm²

22)
titik (6,-5)
tegak lurus = y = -3x+1
m1 = -3
m2 = -1/-3
m2 = 1/3
y-b= m (x-a)
y+5 = 1/3 (x-6)
3y+15 = x – 6
3y – x + 9 = 0
x – 3y – 9 = 0