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Published byChristian Mattinson Modified over 3 years ago

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Session 55 Draw six segments that pass through every dot in the figure without taking your pencil off the paper.

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Go over test The easiest thing to do is to plug in 1 and -1 (or 2 and -2) if you get the same y, then it’s Even. If you get the opposite y, then it’s Odd. If you get different y’s, then it’s Neither.

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Unit 5 Vocabulary The easiest thing to do is to plug in 1 and -1 (or 2 and -2) if you get the same y, then it’s Even. If you get the opposite y, then it’s Odd. If you get different y’s, then it’s Neither.

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Angle A figure formed by 2 rays with a common endpoint. The angle is

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Circle The set of points on a plane at a certain distance, or radius, from a single point, the center

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**Perpendicular Line Two lines that intersect at a right angle (90°).**

Written as

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Parallel Line Lines in a plane that either do not share any points and never intersect, or share all points. Written as

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Line Segment A line with two endpoints. Written as

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**Point An exact position or location in a given plane.**

Point A or Point B

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Line The set of points between points P and Q in a plane and the infinite number of points that continue beyond the points. Written as

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Distance along a line The linear distance between two points on a given line.

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Right Angle An angle that measures 90°.

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Acute Angle An angle measuring less than 90° but greater than 0°.

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Obtuse Angle An angle measuring greater than 90° but less than 180°.

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One-to-One A relationship wherein each point in a set of points is mapped to exactly one other point.

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Pre-image The original figure before undergoing a transformation.

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Image The new, resulting figure after a transformation

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Isometry A transformation in which the preimage and image are congruent.

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**Every segment is congruent to its image.**

Transformations are called RIGID if every image is congruent to its preimage. Rigid transformations can also be referred to as an ISOMETRY. Every segment is congruent to its image.

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**Which of the following are rigid transformations? (Isometry)**

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Isometries not only preserve lengths, but they preserve angle measures parallel lines, and betweenness of points

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**Find the value of each variable, given that the transformation is an isometry.**

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Congruent Figures are congruent if they have the same shape, size, lines, and angles.

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Similar Triangles Triangles are similar if they have the same shape but have different sizes.

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HW Practice WS

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