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Opposite Angles of a Cyclic Quadrilateral

Mathematics · Class 10

A quadrilateral is cyclic when opposite angles add to 180 degrees; the converse is also useful.

opposite angles of a cyclic quadrilateral
understand the idea
apply it carefully
keep the ideas separate
Opposite Angles Of A Cyclic Quadrilateral: A quadrilateral is cyclic when opposite angles add to 180 degrees; the converse is also useful.
WHAT — OPPOSITE ANGLES OF A CYCLIC QUADRILATERAL: A quadrilateral is cyclic when opposite angles add to 180 degrees; the converse is also useful.
HOW — Use the idea: Identify what is given, select this topic's rule or evidence, apply it one step at a time, and check
CORE UNDERSTANDING: A quadrilateral is cyclic when opposite angles add to 180 degrees; the converse is also useful.

Right triangle — Opposite Angles of a Cyclic Quadrilateral — original sketch for this lesson (not copied from a textbook).