Lesson Plans (2) | Learning Activities (1) |

View Standards
**Standard(s): **
[MA2015] (4) 23 :

[MA2015] (4) 26 :

[MA2015] (4) 27 :

23 ) Recognize angles as geometric shapes that are formed wherever two rays share a common endpoint, and understand concepts of angle measurement. [4-MD5]

a. An angle is measured with reference to a circle with its center at the common endpoint of the rays by considering the fraction of the circular arc between the points where the two rays intersect the circle. An angle that turns through ^{1}/_{360} of a circle is called a "one-degree angle" and can be used to measure angles. [4-MD5a]

b. An angle that turns through *n* one-degree angles is said to have an angle measure of *n* degrees. [4-MD5b]

[MA2015] (4) 26 :

26 ) Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures. [4-G1]

[MA2015] (4) 27 :

27 ) Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines or the presence or absence of angles of a specified size. Recognize right triangles as a category, and identify right triangles. [4-G2]

This lesson allows students to explore their surroundings to locate and prove the presence of perpendicular lines. Students will use the corner of a ruler as a tester to determine right angles contained in classroom items. It can be included in a unit on geometry and measurement.

This is a College- and Career-Ready Standards showcase lesson plan.

View Standards
**Standard(s): **
[MA2015] (1) 20 :

[MA2015] (2) 24 :

[MA2015] (3) 24 :

[MA2015] (4) 26 :

[MA2015] (4) 27 :

[MA2015] (4) 28 :

20 ) Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles) or three-dimensional shapes (cubes, right rectangular prisms, right circular cones, and right circular cylinders) to create a composite shape, and compose new shapes from the composite shape. (Students do not need to learn formal names such as "right rectangular prism.") [1-G2]

[MA2015] (2) 24 :

24 ) Recognize and draw shapes having specified attributes such as a given number of angles or a given number of equal faces. (Sizes are compared directly or visually, not compared by measuring.) Identify triangles, quadrilaterals, pentagons, hexagons, and cubes. [2-G1]

[MA2015] (3) 24 :

24 ) Understand that shapes in different categories (e.g., rhombuses, rectangles, and others) may share attributes (e.g., having four sides), and that the shared attributes can define a larger category (e.g., quadrilaterals). Recognize rhombuses, rectangles, and squares as examples of quadrilaterals, and draw examples of quadrilaterals that do not belong to any of these subcategories. [3-G1]

[MA2015] (4) 26 :

26 ) Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures. [4-G1]

[MA2015] (4) 27 :

27 ) Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines or the presence or absence of angles of a specified size. Recognize right triangles as a category, and identify right triangles. [4-G2]

[MA2015] (4) 28 :

28 ) Recognize a line of symmetry for a two-dimensional figure as a line across the figure such that the figure can be folded along the line into matching parts. Identify line-symmetric figures and draw lines of symmetry. [4-G3]

Students will make origamis using Japanese paper folding techniques. This lesson will enhance the students ability to understand geometry concepts.

This is a College- and Career-Ready Standards showcase lesson plan.

View Standards
**Standard(s): **
[MA2015] (4) 27 :

27 ) Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines or the presence or absence of angles of a specified size. Recognize right triangles as a category, and identify right triangles. [4-G2]

In this learning activity, students will collaboratively play an interactive online scavenger hunt for geometric figures including quadrilateral, trapezoid, rhombus, parallelogram, rectangle, square, right triangle, acute triangle, obtuse triangle, angles (right, acute, and obtuse), parallel lines, and perpendicular lines using the GooseChase app.

*This activity results from the ALEX Resource Gap Project.*