4riff4dil4h
Aljabar itu kaya gini misal :
2x + 14 = 20
2x = 20 - 14
2x = 6
x = 6/2
x = 3
ElinaNufit
1) a.AD = CD = 8 cm CD = AB = 12 cm b. sudut ABC = sudut CDA =sudut siku-siku = 90° c. diagonal yang sama panjang : AC = BD d. AD = BC ; AB = CD
2) sudut K = sudut M 2y - 15 = 57 - y 2y + y = 57 + 15 3y = 72 y = 72/3 y = 24
sudut K =2y - 15 =2.24-15=48-15=33° sudut L = 180-33 = 147° sudut N = sudut L = 147° sudut M = 57-y = 57-24=33°
Verified answer
Kelas VII Matematika
Kategori Garis dan Sudut
1]
a. Panjang AD dan CD
AD = CD = 8 cm
CD = AB = 12 cm
b. ABC = siku siku = 90 = CDA
AO = BO = CO = DO
d. AD = BC
2]
∠K = ... ?
∠L = ... ?
∠N = ... ?
∠K = ∠M
2y -15 = 57 - y
3y = 72
y = 24°
∠K = 2y-15
= 2.24 - 15
= 33°
∠L = 180° - 33°
= 147°
∠N = ∠L
= 147°
CD = AB = 12 cm
b. sudut ABC = sudut CDA =sudut siku-siku = 90°
c. diagonal yang sama panjang :
AC = BD
d. AD = BC ; AB = CD
2) sudut K = sudut M
2y - 15 = 57 - y
2y + y = 57 + 15
3y = 72
y = 72/3
y = 24
sudut K =2y - 15 =2.24-15=48-15=33°
sudut L = 180-33 = 147°
sudut N = sudut L = 147°
sudut M = 57-y = 57-24=33°
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