Grade 04 Mathematics - EC: M04.C-G.1.1.2

Continuum of Activities

The list below represents a continuum of activities: resources categorized by Standard/Eligible Content that teachers may use to move students toward proficiency. Using LEA curriculum and available materials and resources, teachers can customize the activity statements/questions for classroom use.

This continuum of activities offers:

Instructional activities designed to be integrated into planned lessons
Questions/activities that grow in complexity
Opportunities for differentiation for each student’s level of performance

Related Academic Standards / Eligible Content

M04.C-G.1.1.2 M04.C-G.1.1.2

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.

Activities

Circle the right triangle.

Identify the shape based on the following description: The shape has 2 acute angles, 2 obtuse angles, and opposite sides are parallel and congruent.

Give all the possible names for the following shape and explain your reasoning for each.

Name this figure and explain.

Jake’s homework assignment was to draw a right triangle, and below is what Jake drew. Is Jake correct? Justify your answer.

Classify the following triangles based on their angles using the chart below.

The following shapes were drawn on the board in your math class, and your teacher asks you what one name you could use to name both of these figures. What would you pick and explain why.

Answer Key/Rubric

Parallelogram

Acceptable responses may include, but are not limited to:

Quadrilateral – has four sides

Parallelogram – opposite sides parallel and congruent

Rectangle – because it has four right angles (two sets of perpendicular lines)

Rhombus – because it has four equal sides

Square – because it has four equal sides and four right angles

The figure would be a parallelogram.

Reasons might include, but are not limited to:

It has opposite angles that are equal

It has 2 sets of sides that are equal in length

It has two sets of parallel sides

The opposite sides are parallel to each other

It has 4 sides

It has opposite sides that are equal in length

Jake is not correct.

Reasons might include, but are not limited to:

The triangle does not have a right angle in it

The triangle is an obtuse triangle

The name that you could use for both figures is rectangle, because both of the quadrilaterals that are drawn have all the properties of a rectangle.

Reason might include, but are not limited to:

Both have 4 sides

Both have 4 right angles

Both have 2 sets of equal length sides

Both have 2 sets of perpendicular sides

Both have opposite sides equal in length