In the following sketch, AF|| BE. Prove that ACDF is a cyclic quadrilateral. F Statement Reason

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
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Please help me with this question by using these three theorems in picture 1.
(e)
In the following sketch, AF || BE. Prove
that ACDF is a cyclic quadrilateral.
(g)
F
Statement
Reason
Transcribed Image Text:(e) In the following sketch, AF || BE. Prove that ACDF is a cyclic quadrilateral. (g) F Statement Reason
TO PROVE THAT A QUADRILATERAL IS CYCLIC
Theorems 4 to 6 were about the properties of a cyclic quadrilateral. The converses of these
theorems are used to prove that a given quadrilateral is cyclic.
If the opposite angles of a quadrilateral are supplementary, then the quadrilateral is cyclic.
CONVERSE OF THEOREM 4
Br
•+X = 180°
Quadrilateral ABCD with ÊB+D=180°
Given:
Conclusion: ABCD is a cyclic quad
Reason:
opp Zs of quad suppl
CONVERSE OF THEOREM 5
If an exterior angle of a quadrilateral is equal to the opposite interior angle then the quadrilateral is
cyclic.
D
B
E
E
Quadrilateral ABCD with BC extended to E. BÂD=EĈD.
Reason:
Given:
Conclusion: ABCD is a cyclic quad
ext Z of quad = opp int 2
CONVERSE OF THEOREM 6
If a line segment joining two points subtends equal angles at two points on the same side of the line
segment, then the four points are concyclic.
B
B
Four points A, B, C and D with A and D on the same side of BC. BẬC=BI C
Reason:
Given:
line subtends = Zs
Conclusion: ABCD is a cyclic quad
53
---
Transcribed Image Text:TO PROVE THAT A QUADRILATERAL IS CYCLIC Theorems 4 to 6 were about the properties of a cyclic quadrilateral. The converses of these theorems are used to prove that a given quadrilateral is cyclic. If the opposite angles of a quadrilateral are supplementary, then the quadrilateral is cyclic. CONVERSE OF THEOREM 4 Br •+X = 180° Quadrilateral ABCD with ÊB+D=180° Given: Conclusion: ABCD is a cyclic quad Reason: opp Zs of quad suppl CONVERSE OF THEOREM 5 If an exterior angle of a quadrilateral is equal to the opposite interior angle then the quadrilateral is cyclic. D B E E Quadrilateral ABCD with BC extended to E. BÂD=EĈD. Reason: Given: Conclusion: ABCD is a cyclic quad ext Z of quad = opp int 2 CONVERSE OF THEOREM 6 If a line segment joining two points subtends equal angles at two points on the same side of the line segment, then the four points are concyclic. B B Four points A, B, C and D with A and D on the same side of BC. BẬC=BI C Reason: Given: line subtends = Zs Conclusion: ABCD is a cyclic quad 53 ---
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