Question

Jawablah 4 pertanyaan tentang lingkaran diatas serta caranya!​

Answer 1

Perbandingan Senilai

Bangun Datar

Lingkaran

1.

AOB/COD = AB/CD

Panjang busur CD

= AB × COD/AOB

= 80 × 150°/40°

= 2 × 150

= 300 cm

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2.

AOB/BOC = OAB/OBC

Luas juring OBC

= OAB × BOC/AOB

= 50 × 90°/45°

= 50 × 2

= 100 cm²

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3.

POQ/QOR = PQ/QR

Besar ∠POQ

= QOR × PQ/QR

= 60° × 120/80

= 60° × 3/2

= 30° × 3

= 90°

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4.

EOF/DOE = OEF/ODE

Besar ∠EOF

= DOE × OEF/ODE

= 60° × 180/80

= 60° × 9/4

= 15° × 9

= 135°