bantuin semuanya Plis di kumpulin besok

Bab Sudut

1) <A +<B = 180 (sepihak)
4x + 5x = 180
9x = 180
x= 20

<A + <D =  180 (sepihak)
4x+ 2y = 180
4(20) + 2y = 180
2y = 180-80
y = 100/2
y = 50

2 <P + LS = 180 (sepihak)
5x - 38 + 2x +15 = 180
7x - 23 = 180
7x = . 203
x = 29

<PQR = <PSR (sifat jajargenjang)
<PQR = 2x+15 = 2(29) + 15 = 73

3.<M = < O (sifat jajargenjang)
2y-15 = 57-y
2y + y = 57 +15
3y = 72
y = 24
<M = 2y -15
<M = 2(24) -15
<M = 33

5) t² = 15²-9² = 225- 81 = 144
t = 12 cm
luas jajargenjang = alas x tinggi
L = 7 x 12
L = 84 cm²