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Splash Screen. Content Standards G.CO.1 Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc.

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Splash Screen


Content Standards

G.CO.1 Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc.

G.CO.12 Make formal geometric constructions with a variety of tools and methods (compass and straightedge, string, reflective devices, paper folding, dynamic geometric software, etc.).

Mathematical Practices

5 Use appropriate tools strategically.

6 Attend to precision.

CCSS


You measured line segments.

  • Measure and classify angles.

  • Identify and use congruent angles and the bisector of an angle.

Then/Now


  • Ray

  • a part of a line that has one endpoint and then extends infinitely in the other direction

**Name always begins with the endpoint

Vocabulary


  • Opposite rays

  • choose a point on a line and either side are called opposite rays

Vocabulary


  • Angle

  • formed by two noncollinear rays (sides) that have a common endpoint (vertex)

Vocabulary


  • Interior

  • “inside the angle”

  • Exterior

  • “outside the angle”

Vocabulary


  • angle bisector

  • a ray that divides an angle into 2 congruent angles

Vocabulary


Answer:

Angles and Their Parts

A. Name all angles that have B as a vertex.

Example 1


Answer:

Angles and Their Parts

B.Name the sides of5.

Example 1


C.

Angles and Their Parts

Example 1


A.

B.

C.

D.

A.

Example 1a


A.

B.

C.

D.none of these

B.

Example 1b


A.

B.

C.

D.

Which of the following is another name for 3?

C.

Example 1c


Concept


Measure and Classify Angles

A. Measure TYV and classify it as right, acute, or obtuse.

Example 2


Measure and Classify Angles

Example 2


Measure and Classify Angles

Example 2


Measure and Classify Angles

INTERIOR DESIGN Wall stickers of standard shapes are often used to provide a stimulating environment for a young child’s room. A five-pointed star sticker is shown with vertices labeled. Find mGBH and mHCI if GBH  HCI, mGBH = 2x + 5, and mHCI =3x – 10.

Example 3


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