Calculating Angles in Arcs

The video tutorial covers the calculation and understanding of various arcs in a circle. It begins with identifying minor arc AB and its angle, followed by calculating arc DC. The tutorial then explains the properties of major arc DAB and concludes with a method to exclude section BC from calculations by subtracting from 360 degrees.

What is the angle of the minor arc AB if the arc angle is given as 80°?

• 100°

• 80°

• 120°

• 60°

If AC is a diameter and the arc from A to C through B is 180°, what is the angle of the arc from A to B?

• 140°

• 80°

• 100°

• 120°

How do you calculate the remaining angle if the diameter AC is 180° and the arc DC is 140°?

• Divide 180° by 140°

• Multiply 140° by 2

• Subtract 140° from 180°

• Add 140° to 180°

What is the angle of the arc from D through A to B if the arcs are 140° and 100°?

• 260°

• 240°

• 220°

• 200°

When calculating the arc from B through C to A, which method is used to exclude a section?

• Add all sections

• Divide by 2

• Multiply by 2

• Subtract from 360°

If the arc from B through C to A excludes a section of 100°, what is the resulting angle?

• 360°

• 260°

• 460°

• 160°