Question

+50
bantu jawab
..................................​

Answer 1

Materi : Sudut dan Garis

Soal Nomor 1

Nilai x

Konsep Penyiku ( 90° )

x + 3x = 90°

4x = 90°

x = 22,5° = ∠ADB

3x = 67,5° = ∠CBD

Soal Nomor 2

Nilai x

Konsep Pelurus ( 180° )

∠BDC + ∠ADC = 180°

( 2x - 10 ) + 3x = 180°

5x = 190°

x = 38°

Maka ∠BDC = 2x - 10 = 76 - 10 = 66°

Semoga bisa membantu

[tex] \boxed{ \colorbox{navy}{ \sf{ \color{lightblue}{ Answer\:by\: BLUEBRAXGEOMETRY}}}} [/tex]

Answer 2

Penjelasan dengan langkah-langkah:

NOMOR 1

a. Sudut CBD ?

b. Besar penyiku sudut CBD ?

Sudut Berpenyiku = x + y = 90°

3x + x = 90°

4x = 90°

x = [tex]\sf \frac{90°}{4} = 22\frac{1}{2} \iff 22,5°[/tex]

A. Sudut CBD?

∠CBD = 3x = 3(22,5) = [tex]\underline {\boxed {\blue {\sf \bf 67,5°}}}[/tex]

B. Penyiku sudut CBD?

Penyiku sudut CBD => Sudut ABD

∠ABD = x = [tex]\underline {\boxed {\blue {\sf \bf 22,5°}}}[/tex]

NOMOR 2

Sudut Berpelurus = x + y = 180°

x + y = 180°

(3x) + (2x - 10) = 180°

3x + 2x = 180° + 10

5x = 190°

x = [tex]\sf \frac{170°}{5} = 38[/tex]

Sudut BDC?

∠BDC = 2x - 10° = 2(38) - 10° = 76 - 10° = [tex]\underline {\boxed {\blue {\sf \bf 66°}}}[/tex]

[tex] \large {\boxed {\blue {\star \:Answered  \: By: \:  \bold {sulkifli2018} \star} } } [/tex]