Question

tolong kak pelissss ​

Answer 1

Materi : Lingkaran

Soal Nomor 11

∠ABC = ½ × ∠( refleks dari AOC )

130° = ½ × ( 360° - ∠AOC )

260° = 360° - ∠AOC

∠AOC = 360° - 260°

∠AOC = 100° { d. }

Soal Nomor 15

L = ∠AOC/360 × π × r²

L = 60°/360° × 22/7 × 14²

L = ⅙ × 616 cm²

L = ⅓ × 308 cm²

L = 102⅔ cm² { a. }

Soal Nomor 16

Cari OB

OB² = OA² + AB²

OB² = 9² + 12²

OB² = 81 + 144

OB² = 225

OB = √225

OB = √(15²)

OB = 15 cm

Langsung Saja

½AC × OB = OA × AB

½AC × 15 = 9 × 12

½AC = ( 3³ × 4 )/( 3 × 5 )

½AC = ( 3² × 4 )/5

½AC = 36/5

½AC = 7,2

AC = 14,4 cm { c. }

Semoga bisa membantu

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