Circle Part 4

Topic:
Circle

Part IV More Inscribed Angles: Questions 1-3

1. Use Toolbar Image (Circle with Center and Radius) to create a 6 unit radius circle. 2. Use Toolbar Image (Polygon) to create 2 triangles inside the circle, all sharing 2 vertices AB and the third vertex C and D are on the same arc. 3. Use Toolbar Image (Angle) to measure ∢ACB and ∢ADB. 

Part IV More Inscribed Angles: Question 4

Repeat steps 1 to 3 on 2 more circles. 

Part IV More Inscribed Angles: Question 5

What do you notice about the inscribed angle measurements?

Part IV More Inscribed Angles: Question 6

Create a circle and a polygon (quadrilateral) with ACB on one arc and ADB on the other, then measure ∢ACB and ∢ADB (opposite angles). 

Part IV More Inscribed Angles: Question 6

What relationship exists between these angles?