Edexcel IGCSE Maths 复习笔记 4.6.3 Circle Theorems - Cyclic Quadrilaterals
1. Opposite angles in a cyclic quadrilateral add up to 180°
2. The perpendicular bisector of a chord is a radius
Remember to add anything you can to a diagram you have been given – write in any angles and lengths you can work out, even if they don’t seem relevant to the actual question.
转载自savemyexam
© 2025. All Rights Reserved. 沪ICP备2023009024号-1