5√6 cm
Penjelasan dengan langkah-langkah:
• BD
= cos 45° = sa/mi
1/2√2 = 10/mi
mi(BD) = 10.2 / √2 (rasionalkn)
= 10√2
• Sudut DBC = 180° - (60+90)°
= 30°
• BC
= cos 30° = sa/mi
1/2√3 = sa/10√2
sa = 10√2 . √3 / 2
BC = 5√6cm
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5√6 cm
Penjelasan dengan langkah-langkah:
• BD
= cos 45° = sa/mi
1/2√2 = 10/mi
mi(BD) = 10.2 / √2 (rasionalkn)
= 10√2
• Sudut DBC = 180° - (60+90)°
= 30°
• BC
= cos 30° = sa/mi
1/2√3 = sa/10√2
sa = 10√2 . √3 / 2
BC = 5√6cm