Materi : Unsur - Unsur Lingkaran
Gambar yang Terlampirkan
∠AEC = ∠ABC = ∠ADC = 90°
----
∠BCE = ∠BCD - ∠ECD
Konsep Segi Empat ABCD ( 360° )
∠BAD + ∠ADC + ∠ABC + ∠BCD = 360°
60° + 90° + 90° + ∠BCD = 360°
∠BCD = 180° - 60°
∠BCD = 120°
∠BCE = 120° - 25° = 95° { a. }
Semoga bisa membantu
[tex] \boxed{ \colorbox{navy}{ \sf{ \color{lightblue}{ Answer\:by\: BLUEBRAXGEOMETRY}}}} [/tex]
(60 + 90 + 90)° + <BCD = 360°
(60 + 180)° + <BCD = 360°
240° + <BCD = 360°
<BCD = (360 - 240)°
<BCD = 120°
MAKA :
<BCE = (120 - 25)°
= 95° (A)
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Materi : Unsur - Unsur Lingkaran
Gambar yang Terlampirkan
∠AEC = ∠ABC = ∠ADC = 90°
----
∠BCE = ∠BCD - ∠ECD
Besar Sudut BCD
Konsep Segi Empat ABCD ( 360° )
∠BAD + ∠ADC + ∠ABC + ∠BCD = 360°
60° + 90° + 90° + ∠BCD = 360°
∠BCD = 180° - 60°
∠BCD = 120°
Kesimpulan
∠BCE = ∠BCD - ∠ECD
∠BCE = 120° - 25° = 95° { a. }
Semoga bisa membantu
[tex] \boxed{ \colorbox{navy}{ \sf{ \color{lightblue}{ Answer\:by\: BLUEBRAXGEOMETRY}}}} [/tex]
(60 + 90 + 90)° + <BCD = 360°
(60 + 180)° + <BCD = 360°
240° + <BCD = 360°
<BCD = (360 - 240)°
<BCD = 120°
MAKA :
<BCE = (120 - 25)°
= 95° (A)