Question

Tolong bantu aku dong pilihan ganda no 8-25 pakai cara nya sekalian ya plisss aku mohon banget tolong bantuan nya ya kaka2 baik

Answer 1

No 8
K = 1/2  π .d + 1/2 π.d
    = 1/2 π ( d + d)
   = 1/2 22/7. ( 21 + 10,5)
   = 1/2 . 22/7 x 31,5
   = 49,5

nomer 10
hubungan keliling dengan luas
L = K²/4π
L = (44. 44) / ( 4 . 22/7)
L = 154

nomer 12
luas di arsir = 8 x luas tembereng
L = 8 . ( 1/4 . 3,14 x 5² - 1/2 . 5 . 5)
L = 8 . ( 19,625 - 12,5)
L = 8 . 7,125
L = 57

nomer 14
AB  = (108/72) x 3,14
AB = 4,71

nomer 16
L = 1/4 . 22/7 . 3,5² - 1/2 . 3,5²
L = 3,5

nomer 18
 BDC = 1/2 . ( 180 - 82)
BDC = 49

nomer 20
ADC = 1/2 . ( 180 - 54)
ADC = 63

nomer 22
maaf, saya lupa teorinya

nomer 24
3y + 2y = 180
5y = 180
 y = 36

5x + 7x = 180
12x = 180
x = 15

x +  y = 15 + 36 = 51