Math Problem Statement
Diketahui panjang jari-jari sebuah lingkaran 20 cm. Tentukan:
a. panjang busur di hadapan sudut 30°
b. luas juring di hadapan sudut 45°
Solution
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Math Problem Analysis
Mathematical Concepts
Geometry
Circles
Arc Length
Sector Area
Formulas
Arc length formula: l = (θ/360°) × 2πr
Sector area formula: L = (θ/360°) × πr²
Theorems
Circle geometry formulas
Suitable Grade Level
Grades 9-11
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