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Classic Models in Angle Calculation - Difficult Question Types (One Example and Three)

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Today, I would like to share with you a copy of the mathematics "Classic Model in Angle Calculation - Difficult Problem Types (One Inverse Three)", which covers eight major problem types: Question Type 1 Double Vertical Model; Question Type 2 A Word Model; Question Type 3 8 Character Model; Question Type 4 Dart Model; Question Type 5 Kite Model; Question Type 6 Two Inner Angle Bisector Model; Question Type 7 Two Outer Angle Bisector Model; Question Type 8 Inner and Outer Corner Bisector Model. The content is very good, I believe it is useful to many friends! Friends who need it can download it by themselves.

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Classic Models in Angle Calculation - Difficult Question Types (One Example and Three)
Classic Models in Angle Calculation - Difficult Question Types (One Example and Three)
Classic Models in Angle Calculation - Difficult Question Types (One Example and Three)
Classic Models in Angle Calculation - Difficult Question Types (One Example and Three)
Classic Models in Angle Calculation - Difficult Question Types (One Example and Three)
Classic Models in Angle Calculation - Difficult Question Types (One Example and Three)
Classic Models in Angle Calculation - Difficult Question Types (One Example and Three)
Classic Models in Angle Calculation - Difficult Question Types (One Example and Three)
Classic Models in Angle Calculation - Difficult Question Types (One Example and Three)
Classic Models in Angle Calculation - Difficult Question Types (One Example and Three)
Classic Models in Angle Calculation - Difficult Question Types (One Example and Three)
Classic Models in Angle Calculation - Difficult Question Types (One Example and Three)
Classic Models in Angle Calculation - Difficult Question Types (One Example and Three)
Classic Models in Angle Calculation - Difficult Question Types (One Example and Three)
Classic Models in Angle Calculation - Difficult Question Types (One Example and Three)

【Question Type 1 Double Vertical Model】

Condition] ZB=ZD=ZACE=90°

【Conclusion】 ZBAC=ZDCE, ZACB=ZCED

[Proof]: B=ZD=ZACE=90°; ... ZBAC+ZACB=90°; ZeCD+ZACB=90°:. ZBAC=ZDCE

Similarly, ZACB+ZDCE =90°, and ZCED+ZDCE=90°; ... ZACB = ZCED, certified.

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