'Opposite angles' diaporamas de présentation

All 3 Sides are equal in Length

EQUILATERAL TRIANGLE. All 3 Sides are equal in Length. All 3 interior angles are the same. ISOSCELES TRIANGLE. Two Sides of equal Length. Two interior angles are the same. SCALENE TRIANGLE. No Sides of equal Length. All interior angles are different. RIGHT ANGLED.

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Polygons

Polygons. A many sided figure.

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Angles

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Parallelograms

Parallelograms. 5-1. ALGEBRA. Find the values of x and y . CD. AB =. Opposite sides of a are . 12. x + 4 =. x =. 8. or m A = m C . . By Theorem 8.4, A C , . ANSWER. In ABCD , x = 8 and y = 65. EXAMPLE 1. Use properties of parallelograms.

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Developing Geometric Thinking: Van Hiele Levels

Developing Geometric Thinking: Van Hiele Levels . Mara Alagic. Van Hiele: Levels of Geometric Thinking. Precognition Level 0: Visualization/Recognition Level 1: Analysis/Descriptive Level 2: Informal Deduction Level 3:Deduction Level 4: Rigor. Van Hiele: Levels of Geometric Thinking.

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Developing Geometric Thinking: The Van Hiele Levels

Developing Geometric Thinking: The Van Hiele Levels . Adapted from Van Hiele, P. M. (1959). Development and learning process. Acta Paedogogica Ultrajectina (pp. 1-31). Groningen: J. B. Wolters. Van Hiele: Levels of Geometric Thinking. Precognition Level 0: Visualization/Recognition

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5.10

5.10. Prop. of Rhom., Rect., and Squares. A. B. C. D. Rhombus Corollary. A quadrilateral is a rhombus if and only if it has four congruent _______. sides. ABCD is a rhombus if and only if. 5.10. Prop. of Rhom., Rect., and Squares. B. A. C. D. Rectangle Corollary.

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Lesson 8.5: Properties of Trapezoids and Kites

Lesson 8.5: Properties of Trapezoids and Kites. Geometry. Definitions. Trapezoid: A Quadrilateral with exactly one pair of parallel sides. The parallel sides are the bases . The nonparallel sides are the legs .

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Prove that a given quadrilateral is a parallelogram.

Objective. Prove that a given quadrilateral is a parallelogram. You can use the given information about a figure to decide which condition is best to apply. The two theorems below can also be used to show that a given quadrilateral is a parallelogram.

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Geomatrical Figure

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Circle Theorems: 3.

The opposite angles of a cyclic quadrilateral add up to 180 0. Circle Theorems: 3. D. cyclic quadrilateral. C. A. B. The opposite angles of a cyclic quadrilateral add up to 180 0. Circle Theorems: 3. D. C. A. B. The opposite angles of a cyclic quadrilateral add up to 180 0.

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QUADRILATERALS

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Objectives

Objectives. State the properties of rectangles, rhombuses, and squares Solve problems involving rectangles, rhombuses, and squares. Diagonals of Rhombus Bisect Angles. A parallelogram is a rhombus if and only if each diagonal bisects two angles of the rhombus. ?1 ? ?2 and ?3 ? ?4

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welcome

welcome. SUBMITTED BY. ASHA.P.SAGAR. ANUSREE.A.R. JUVAIRIYA.SHAJAHAN. LEKSHMI.J.NAIR. 9th . N. QUADRILATERAL .

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13.5 Law of Cosines

13.5 Law of Cosines. Objectives: Solve problems by using the Law of Cosines Determine whether a triangle can be solved by first using the Law of Sines or the Law of Cosines. Law of Cosines.

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Lesson 6-1

Parallelograms. Lesson 6-1. B. C. D. A. Parallelogram. Definition:. A quadrilateral whose opposite sides are parallel. A parallelogram is named using all four vertices. You can start from any one vertex, but you must continue in a clockwise or counterclockwise direction.

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Warm-Up 5/29/13

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