Question

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Answer 1

1.

<A = <B

5x - 10° = 3x + 20°

5x - 3x = 20° + 10°

2x = 30°

x = 30/2

x = 15°

besar sudut A = besar <B

(pilih salah satu)

<A = 5x - 10

<A = 5 x 15 - 10

<A = 65°

2.

<AOE + <EOD + <DOC + <COB = 180

4x + 15 + 3x + 10 + 2x + 5 + x = 180°

4x + 3x + 2x + x + 15 + 10 + 5 = 180°

10x + 30 = 180°

10x = 180 - 30

10x = 150°

x = 150/10

x = 15°

<BOD = <BOC + <COD

<BOD = x + 2x + 5

<BOD = 3x + 5

<BOD = 3 x 15 + 5

<BOD = 45 + 5

<BOD = 50°

3.

6.30

6 jam + 30 menit

besar sudut

= 6 x 30 + 30/60 x 30

= 180 + 15

= 195°

6 x 30 = 180°

195° - 180° = 15°

besar sudut terkecil yang dibentuk pada pukul 6.30 adalah 15°

semoga membantu jangan lupa untuk follow ya

Answer 2

1. ∠A = ∠B ( dalam berseberangan)

5x - 10° = 3x + 20°

5x - 3x = 20° + 10°

2x = 30°

x = 30/2

x = 15°

∠A = 5 (15) - 10

∠A = 75 - 10

∠A = 65°

∠B = 3 (15) + 20

∠B = 45 + 20

∠B = 65°

2. (4x + 15) + (3x + 10) + (2x + 5) + x = 180

10x + 30 = 180

10x = 180 - 30

10x = 150

x = 150/10

x = 15

∠BOD = ∠BOC + ∠COD

= x + 2x + 5

= 3 (15) + 5

= 45 + 5

= 50°

3. Pergeseran jarum panjang

30 x 6 = 180

Pergeseran jarum pendek

6 x 30 + 30/60 x 30

180 + 15 = 195

Selisih

195 - 180 = 15°