4.4 Angles in a circle
Angles in a circle
In a circle, chords, angles, inscribed angles and arc length all have special relationships with each other. This lesson focuses on exploring the relationships among inscribed angles in a circle as well as those of inscribed angle and central angle with the same arc. We will make use of the relationships to solve related questions in this lesson.
Basic concepts:
 Central angles and proofs
 Inscribed angles and proofs
Lessons

1.
In the following diagram, the radius is 24 cm and $\angle$BDC is 75°.

3.
Given $\angle$BAE = 44.5° and $\angle$ADC = 64.27°.
Find.