Area, Surface & Volumeeasy
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An annular sector (a sector of a ring-shaped region) has an outer radius of 8 cm, an inner radius of 5 cm, and a central angle of 90°. What is its area? (Use )
An annular sector (a sector of a ring-shaped region) has an outer radius of 8 cm, an inner radius of 5 cm, and a central angle of 90°. What is its area? (Use )