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Chapter 7 Circles, Arcs and Sectors are the second most difficult chapter in the book. Go through the detailed solutions to help. This chapter covers circumference, arc length, sector area, and semi-circles. The questions in this chapter start off as easy but get much more difficult towards the end.

Pertinent Formulas



Arc length = (central angle/360 deg) (2pir)

Area of a Sector = (central angle/360 deg) (pi(r)^2)

Area of a Triangle 1/2(b)(h)

Area of a Rectangle lxw

Section Difficulty Level 9.5 

Maximize ACT Math Chapter 7 with Detailed Solutions

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