'Cd ef' diaporamas de présentation

5-5

5-5. Coordinate Geometry. Warm Up. Problem of the Day. Lesson Presentation. Pre-Algebra. 5-5. Coordinate Geometry. Pre-Algebra. Warm Up Complete each sentence. 1 . Two lines in a plane that never meet are called lines. 2 . lines intersect at right angles.

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2.5 Proving Statements about Line Segments

2.5 Proving Statements about Line Segments. Theorems are statements that can be proved. Theorem 2.1 Properties of Segment Congruence Reflexive AB ? AB All shapes are ? to them self Symmetric If AB ? CD, then CD ? AB Transitive If AB ? CD and CD ? EF, then AB ? EF.

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???????? 2

???????? 2. ??????? ??. ????. ?????? ABCD?AC?BD ???? O, ? OA=OC,OB=OD, ???? ABCD ?__________,??? ____ _____________________ ___________. ?????. ???????????????????. ????. ?????? ABCD ?? AB//CD, ? AB=CD, ???? ABCD ?___________,???___________________________ _

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平行四边形的判别 (2)

平行四边形的判别 (2). 40. A. B. 探索 : （ 课本 P91. ）. 30. 30. 40. D. C. 如图，将两根长 40cm 的木条和两根长 30cm 的木条作为四边形的四条边，能否拼成一个平行四边形？与同伴进行交流。. 判别方法四 :. 两组对边分别相等的四边形是平行四边形. A. D. B. C. 符号语言：. ∵ AB=DC AD=BC ∴ 四边形 ABCD 是平行四边形. 平行四边形的判别方法：. 两组对边分别相等的四边形是平行四边形.

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Course 3

7-5. Coordinate Geometry. AB. positive slope; slope of AB =. 1 8. Course 3. Check It Out: Example 1A. Determine if the slope of each line is positive, negative, 0, or undefined. Then find the slope of each line. B. A. C. E. F. G. H. D. 7-5. Coordinate Geometry.

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EXAMPLE 3

a. b. a. CD EF because they are in the same circle and mCD = mEF. b. RS and TU have the same measure, but are not congruent because they are arcs of circles that are not congruent. EXAMPLE 3. Identify congruent arcs. Tell whether the red arcs are congruent. Explain why or why not.

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EXAMPLE 3

a. b. a. CD EF because they are in the same circle and mCD = mEF. b. RS and TU have the same measure, but are not congruent because they are arcs of circles that are not congruent. EXAMPLE 3. Identify congruent arcs. Tell whether the red arcs are congruent. Explain why or why not.

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EXAMPLE 3

a. b. a. CD EF because they are in the same circle and mCD = mEF. b. RS and TU have the same measure, but are not congruent because they are arcs of circles that are not congruent. EXAMPLE 3. Identify congruent arcs. Tell whether the red arcs are congruent. Explain why or why not.

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Network Security in Ring Multicast

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