# 11X1 T07 03 angle theorems 2

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Angle Theorems

Angle Theorems(5b) Opposite angles of a cyclic quadrilateral are supplementary.

Angle Theorems(5b) Opposite angles of a cyclic quadrilateral are supplementary.

Angle Theorems(5b) Opposite angles of a cyclic quadrilateral are supplementary.

Angle Theorems(5b) Opposite angles of a cyclic quadrilateral are supplementary.

Angle Theorems(5b) Opposite angles of a cyclic quadrilateral are supplementary.Proof:Join AO and CO

Angle Theorems(5b) Opposite angles of a cyclic quadrilateral are supplementary.Proof:Join AO and CO

Angle Theorems(5b) Opposite angles of a cyclic quadrilateral are supplementary.Proof:Join AO and CO

Angle Theorems(5b) Opposite angles of a cyclic quadrilateral are supplementary.Proof:Join AO and CO

Angle Theorems(5b) Opposite angles of a cyclic quadrilateral are supplementary.Proof:Join AO and CO

(5c) The exterior angle of a cyclic quadrilateral is equal to the opposite interior angle.

(5c) The exterior angle of a cyclic quadrilateral is equal to the opposite interior angle.

(5c) The exterior angle of a cyclic quadrilateral is equal to the opposite interior angle.

(6) Angles subtended at the circumference by the same or equal arcs (or chords) are equal.

(6) Angles subtended at the circumference by the same or equal arcs (or chords) are equal.

(6) Angles subtended at the circumference by the same or equal arcs (or chords) are equal.

(6) Angles subtended at the circumference by the same or equal arcs (or chords) are equal.

(6) Angles subtended at the circumference by the same or equal arcs (or chords) are equal.Proof: Join AO and DO

(6) Angles subtended at the circumference by the same or equal arcs (or chords) are equal.Proof: Join AO and DO

(6) Angles subtended at the circumference by the same or equal arcs (or chords) are equal.Proof: Join AO and DO

(6) Angles subtended at the circumference by the same or equal arcs (or chords) are equal.Proof: Join AO and DOExercise 9C; 1 ace etc, 2 aceg, 3, 4 bd, 6 bdf, 7 bdf, 9, 13, 14