In a circle with radius r=10cm the chord s has the central angle α=84∘.
What is the length of the chord?
For this task you need the following basic knowledge: Sine, Cosine and Tangent
Given.: r=10cm; α=84∘
Required.: x
First, draw a sketch.
Compute x using the sine.
Solve for x and plug in values.
Computex .
Since x is half of the chord s , double it to get the chord s.
⇒ The length of the chord is 13.4cm.