Angles and Circles

 

Angle in a semi-circle

bbc.co

 

The angle in a semi circle is  90°.

 

Angle between a tangent and a radius of a circle

mymathsworld.wordpress.com

 

The angle between a tangent at a point and the radius to the same point of a circle is  90°.

 

Angle at the centre of a circle

podmaths.com

 

The angle formed at the centre of a circle by an arc is twice the size of the angle on the circumference formed by the same arc.

 

Angles in the same segment

protopage.com

 

Angles in the same segment of a circle are equal.

 

 

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