This video tutorial explains inscribed quadrilaterals in circles, focusing on their unique property where opposite angles are always supplementary. It delves into the concept of inscribed angles and their relationship with arcs, demonstrating why the sum of opposite angles equals 180 degrees. The tutorial uses equations to illustrate this property, emphasizing the geometric principles behind it.

What is an inscribed quadrilateral?

• A quadrilateral with all vertices inside a circle

• A quadrilateral with all vertices on the circle

• A quadrilateral with no vertices on the circle

• A quadrilateral with one vertex on the circle

What is the unique property of opposite angles in an inscribed quadrilateral?

• They are equal

• They are complementary

• They are congruent

• They are supplementary

If angle A and angle C are opposite angles in an inscribed quadrilateral, what is their sum?

• 90°

• 270°

• 360°

• 180°

Why are opposite angles in an inscribed quadrilateral supplementary?

• Because they intercept arcs that together form a full circle

• Because they intercept the same arc

• Because they are complementary

• Because they are equal

What is the measure of a full circle in degrees?

• 180°

• 360°

• 270°

• 90°

How is the measure of an inscribed angle related to the arc it intercepts?

• It is equal to the arc's measure

• It is half the arc's measure

• It is double the arc's measure

• It is unrelated to the arc's measure

What is the sum of all angles in a quadrilateral?

• 360°

• 90°

• 180°

• 270°

What happens when you divide the sum of the measures of arcs BCD and BAD by two?

• You get 180°

• You get 360°

• You get 270°

• You get 90°

What is the relationship between the measure of angle A and the arc BCD?

• Angle A is unrelated to the measure of arc BCD

• Angle A is equal to the measure of arc BCD

• Angle A is half the measure of arc BCD

• Angle A is double the measure of arc BCD

What is the conclusion about opposite angles in an inscribed quadrilateral?

• They are always equal

• They are always supplementary

• They are always complementary

• They are always congruent