Theme 4 Unit Anne Arundel County Public Schools | Department of Academics & Strategic Initiatives How can you help your child be successful in mathematics? Important Concepts: -Draw and identify points, lines, line segments, rays, angles (right, acute, obtuse), and parallel and perpendicular lines in two-dimensional figures. -Classify two-dimensional figures depending on whether or not the figure has parallel or perpendicular lines. -Recognize a line of symmetry in two-dimensional figures. -Solve addition and subtraction problems to find unknown angles in a diagram in mathematical and real-world type situations. -Generate number or shape patterns that follows a given rule. Misconceptions: - Children may struggle identifying attributes using special reasoning. Allow your child to use precise tools to measure angles and distances. -Children may have a narrow understanding of what shapes look like. Expose your child to two- dimensional figures of varying sizes. -Perpendicular lines are sometimes hard to identify for children. Provide real world examples where you would find something that is perpendicular to something else so that your child can make the connection to perpendicular lines found in two- dimensional shapes. Dear Parents, In Unit 11, students will focus on classifying geometric shapes based on properties of lines and angles. They will explore the relationship between parallel and perpendicular lines and use that knowledge to identify attributes of polygons. Students will also work with angle measurement to classify triangles and quadrilaterals. Students will build their vocabulary to identify lines of symmetry in familiar figures. Finally, students will explore features of growing and repeating shape patterns. Vocabulary: Point: a single location in space Line: a straight row of points that goes on forever in both directions Line Segment: a straight row of points that starts at one point and ends at another Ray: a straight row of points that starts at one point and goes on forever in one direction Angle: a geometric shape formed by two lines, line segments or rays that meet at a common point Right Angle: an angle that measures 90 degrees Acute Angle: an angle that measures less than 90 degrees Obtuse Angle: an angle that measures greater than 90 degrees Perpendicular Lines: two lines that intersect at a 90 degree angle Grade 4 Parent Newsletter

· Web viewTheme 4 Unit 13Dear Parents, In Unit 11, students will focus on classifying geometric shapes based on properties of lines and angles. They will explore the relationship

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Theme 4 Unit 13

Anne Arundel County Public Schools | Department of Academics & Strategic Initiatives

How can you help your child be successful in mathematics?

Important Concepts:-Draw and identify points, lines, line segments, rays, angles (right, acute, obtuse), and parallel and perpendicular lines in two-dimensional figures.-Classify two-dimensional figures depending on whether or not the figure has parallel or perpendicular lines.-Recognize a line of symmetry in two-dimensional figures.-Solve addition and subtraction problems to find unknown angles in a diagram in mathematical and real-world type situations.-Generate number or shape patterns that follows a given rule.

Misconceptions:- Children may struggle identifying attributes using special reasoning. Allow your child to use precise tools to measure angles and distances. -Children may have a narrow understanding of what shapes look like. Expose your child to two-dimensional figures of varying sizes.-Perpendicular lines are sometimes hard to identify for children. Provide real world examples where you would find something that is perpendicular to something else so that your child can make the connection to perpendicular lines found in two-dimensional shapes.

Things to Do:- Look for examples of things that are parallel or perpendicular in the real world. -Go on an “Angle Hunt” around the house. Find objects and identify the angles are obtuse, right, or acute.-Find objects that have a line of symmetry. Have your child identify how many lines of symmetry the object has.

Dear Parents,

In Unit 11, students will focus on classifying geometric shapes based on properties of lines and angles. They will explore the relationship between parallel and perpendicular lines and use that knowledge to identify attributes of polygons. Students will also work with angle measurement to classify triangles and quadrilaterals. Students will build their vocabulary to identify lines of symmetry in familiar figures. Finally, students will explore features of growing and repeating shape patterns.

Thank you for your support,

Your Child’s 4th Grade TeacherVocabulary:Point: a single location in space

Line: a straight row of points that goes on forever in both directions

Line Segment: a straight row of points that starts at one point and ends at

another

Ray: a straight row of points that starts at one point and goes on forever in one direction

Angle: a geometric shape formed by two lines, line segments or rays that meet at a common point

Right Angle: an angle that measures 90 degrees

Acute Angle: an angle that measures less than 90 degrees

Obtuse Angle: an angle that measures greater than 90 degrees

Perpendicular Lines: two lines that intersect at a 90 degree angle

Parallel lines: two lines that are always the same distance apart and never intersect