Angle in a semi-circle is a right angle
- Author:
- Yoong Kheong
Blue pt for :
1. Moving the point respective pt A and C along the circumference.
Red pt for:
1. Moving the centre, 0.
Black pt F for:
1. Moving the point F hence rotating the dotted straight line through B and O.
Slide for:
Changing the radius of the circle.
Exploration:
Check the angle in the semi-circle. Use the radius and move the centre to show the angle property of circle -
Angle in a semi-circle is a right angle.