LEARN NC

K–12 teaching and learning · from the UNC School of Education

Goal 3

Geometry - The learner will understand and use properties and relationships of plane figures.

Objective 3.04

Solve problems involving the properties of triangles, quadrilaterals, and other polygons.

  • Sum of the measures of interior angles.
  • Lengths of sides and diagonals.
  • Parallelism and perpendicularity of sides and diagonals.

Resources aligned to this objective

Lesson plans on the web

Constructing a three-dimensional model
In this lesson, one of a multi-part unit from Illuminations, students build a three-dimensional model of a clubhouse from two-dimensional blueprints designed in an earlier lesson. (Learn more)
Format: lesson plan (grade 3–5 Mathematics)
Provider: National Council of Teachers of Mathematics
Covering the Plane with Rep-Tiles
Students discover and explore a special kind of tiling of the plane. (Learn more)
Format: lesson plan (grade 5–7 Mathematics)
Provider: National Council of Teachers of Mathematics
Getting to know the shapes
In this lesson, one of a multi-part unit from Illuminations, students discover the uses of geometry and measurement in the world of architecture as they are introduced to a project in which they design a clubhouse. (Learn more)
Format: lesson plan (grade 3 and 5 Mathematics)
Provider: National Council of Teachers of Mathematics
Learning about length, perimeter, area, and volume of similar objects using interactive figures: Side length and area of similar figures
This two-part example illustrates how students can learn about the length, perimeter, area, and volume of similar objects using dynamic figures. (Learn more)
Format: lesson plan (grade 4–8 Mathematics)
Provider: National Council of Teachers of Mathematics
Looking for patterns
In this lesson, one of a multi-part unit from Illuminations, students use an online, interactive activity to analyze characteristics and properties of three-dimensional geometric shapes. (Learn more)
Format: lesson plan (grade 3–5 Mathematics)
Provider: National Council of Teachers of Mathematics
Mathematics at the mall: Unit overview
Students participate in activities in which they develop number sense in and around the shopping mall. (Learn more)
Format: lesson plan (grade 4–8 Mathematics)
Provider: National Council of Teachers of Mathematics
Paper quilts: Looking back and moving forward
In this lesson, one of a multi-part unit from Illuminations, students use mathematical knowledge and skills developed in the previous lessons to demonstrate understanding and ability to apply that knowledge to create a classroom display. (Learn more)
Format: lesson plan (grade 3–5 Mathematics)
Provider: National Council of Teachers of Mathematics
Parking at the Mall
Students develop number sense in and around the shopping mall. (Learn more)
Format: lesson plan (grade 4–5 Mathematics)
Provider: National Council of Teachers of Mathematics
Planning a road trip
This lesson reviews latitude and longitude and asks students to find the latitude and longitude for several United States cities. (Learn more)
Format: lesson plan (grade 3–5 Social Studies and Mathematics)
Provider: National Geographic
Rectangles and parallelograms
In this lesson, from Illuminations, students use dynamic software to examine the properties of rectangles and parallelograms and then identify what distinguishes a rectangle from a more general parallelogram. (Learn more)
Format: lesson plan (grade 3 Mathematics)
Provider: National Council of Teachers of Mathematics
What's in a Shape?
By using tangram shapes children learn the relationships between shapes that two identical right isosceles triangles fit together to form a square. (Learn more)
Format: lesson plan (grade 3–5 Mathematics)
Who was Wassily Kandinsky?
In this lesson, one of a multi-part unit from Illuminations, students explore the geometric figures Wassily Kandinsky used in his art. Students participate in a scavenger hunt to become familiar with Kandinsky's works and the geometric figures used in art. (Learn more)
Format: lesson plan (grade 3–5 Mathematics and Visual Arts Education)
Provider: National Council of Teachers of Mathematics