Nursing Entrance Exam

Nursing Preparation Study Guide o The measure of the central angle is equal to the measure of the intercepted arc. • Inscribed Angle: an angle formed by two chords in a circle which have a common endpoint. This common endpoint forms the vertex of a circle. o The measure of an inscribed angle is equal to half the measure of its inscribed arc.

4.3.7 Area of a Sector of a Circle A sector is a fractional part of a circle. Think of an entire pizza as a circle. A sector would be a single slice of pizza. To find the area of a sector of a circle we use the formula = ò DÑK° 8 . Example Find the area of the sector if the radius is 2 cm. = 360° 8 = 60 360 (2) 8 1 = 6 (4) 2 = 3 ≈ 2.09 cm 8 Again, notice the units are squared because we found the area of a sector.

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