Drag to explore
Make the inscribed angle exactly by changing the central angle.
Central Angle
Match the angles
Drag the correct measurements to the inscribed angles that subtend the blue arc.
Drop
Tap 90° angles
Tap the circles where the inscribed triangle creates a right () angle. Hint: Look at the center!
Balance to 180°
In a cyclic quadrilateral, opposite angles add up to . Find .
+
=
Master of Circles!
You've mastered inscribed angles, cyclic quadrilaterals, and arcs.