Question

tolonglah siapa yg bisa ini bantuin saya dengan langkah langkahnya​

Answer 1

Penjelasan dengan langkah-langkah:

1. A. 10°

penyelesaian:

90° = 5a + 4a

90° = 9a

90°/9 = a

10° = a

2. C. 20°

penyelesaian:

180° = 3x + 80° + 2x

180° = 5x + 80°

180° - 80° = 5x

100° = 5x

100° / 5 = x

20° = x

3. D. 60°

penyelesaian:

180° = 4x + 2x

180° = 6x

180° / 6 = x

30° = x

- sudut QOR

= 2x

= 2(30)

= 60

4. B. 32°

penyelesaian:

∠SQR + ∠PQS = 90°

90° = (3x + 5)° + (6x+4)°

= 9x° + 9°

90° / 9 = 9x°

= 81°

∠SQR = (3x + 5)

∠SQR = 3 × 9 + 5

∠SQR = 32°

5. D. 70°

Penyelesaian:

∠ABC + ∠CBD = 180° (saling berpelurus)

∠ABC + 112° = 180°

∠ABC = 68°

∠BCA + ∠ABC + ∠BAC = 180°

∠BCA + 68° + 42° = 180°

∠BCA + 110 = 180°

∠BCA = 70°

Answer 2

✏JAWABAN:

1. Menentukan Nilai a =

5a + 4a = 90°

9a = 90°

a = 90° ÷ 9

a = 10° ( A )

-

2. Menentukan Nilai x =

3x + 80° + 2x = 180°

5x + 80° = 180°

5x = 180° - 80°

5x = 100°

x = 100° ÷ 5

x = 20° ( C )

-

3. Menentukan Nilai x =

4x + 2x = 180°

6x = 180°

x = 180° ÷ 6

x = 30°

-

Menentukan Besar <QOR =

= 2x°

= 2(30)°

= 60° ( D )

-

4. Menentukan Nilai x =

( 6x + 4 ) + ( 3x + 5 ) = 90°

6x + 4 + 3x + 5 = 90°

9x + 9 = 90°

9x = 90° - 9

9x = 81°

x = 81° ÷ 9

x = 9

-

Menentukan Besar <SQR =

= 3x + 5°

= 3(9) + 5°

= 27 + 5°

= 32° ( B )

-

5. Menentukan Besar <ABC =

<ABC + <CBD = 180°

<ABC + 112° = 180°

<ABC = 180° - 112°

<ABC = 68°

-

Menentukan Besar <BCA =

<ABC + <BAC + <BCA = 180°

68° + 42° + <BCA = 180°

110° + <BCA = 180°

<BCA = 180° - 110°

<BCA = 70° ( D )