Arc Length and Sector Area

Arc Length

Example 1

Calculate the length of the arc, giving your answer to 1 decimal place.

Example 2

Calculate the length of the minor arc, giving your answer to 1 decimal place.

Sector Area

Example 1

Calculate the area of the sector, round your answer to 1 decimal place.

Example 2

Calculate the area of the minor arc. Leave your answer in terms of π.

Finding the Sector Angle

An arc AB of a circle with radius 8cm has length 12cm.

Find θ , the sector angle.

Example 1

If you know the radius of a circle and either an arc length or a sector area, you can calculate the sector angle.

Answers

3 (a) 7.9cm (b) 4.7cm (c) 18.8cm (d) 3.7cm (e) 4.9cm(f) 16.8cm (g) 20.9cm (h) 12.6cm

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