Lesson Plan
Pennsylvania Department of Education

Making Triangles

For Teachers Pre-K - 2nd
Learners use interactive geoboards to identify simple geometric shapes. In this making triangles lesson, students describe the properties associated with geometric shapes. Learners develop spatial sense and the mathematical meaning...
Lesson Plan
Curated OER

Our Geometric World

For Teachers 3rd
Third graders explore the attributes of polygons. In this geometric shapes lesson, 3rd graders review quadrilaterals, squares, rectangles, triangles, pentagons, hexagons, and octagons in order to create hanging polygons. Students then...
Organizer
Curated OER

Triangle Worksheet: Cut, Construct and Think 1

For Students 6th
In this triangle worksheet, 6th graders draw and cut out a triangle, cut it into three pieces, then arrange the pieces to make new shapes.
Lesson Plan
Curated OER

Worksheet 19-Spring 1996

For Teachers Higher Ed
In this math worksheet, students begin with the Maclaurin series and prove De Moivre's Theorem. They use the De Moivre Theorem to solve four problems. Students apply these theorems to explain why a flock of geese will fly in an uneven...
Lesson Plan
Curated OER

Reflections

For Teachers 5th
Fifth graders create a reflection of a poygon using a Mira. They discover that a line connecting a vertiex of a polygon and the corresponding vertex of its reflection is perpendicular to the line of reflection. Students create a glide...
Worksheet
Curated OER

Introducing Polygons

For Students 3rd - 5th
For this polygons worksheet, students name the 6 different colored shapes, choose any 3 polygons to draw and color on a grid, while adding a right angled triangle and a rhombus.
Worksheet
Print and Practice

Tracing Shapes #2

For Students K - 2nd
in this tracing shapes worksheet, students trace a set of shapes and shape words, 12 total. A reference web site is giving for additional activities.
Worksheet
Print and Practice

Tracing Shapes

For Teachers 1st - 3rd
In this shape worksheet, students trace a set of shapes and then trace each shape word, both in printing and cursive lettering. A reference web site is given for additional activities.
Lesson Plan
Curated OER

Formula Determination

For Teachers 9th - 12th
Students derive a formula for the interior degrees in any convex polygon. In this geometric figure lesson, students determine the shapes of various polygons and the number of triangles formed. They use this information to derive the...
Worksheet
Curated OER

Working in 3-D Sudoku

For Students 7th
In this geometric shapes worksheet, 7th graders solve and complete 8 different problems that include working in a 3-D sudoku puzzle. First, they determine the area of a circle of a sphere to the nearest tenth. Then, students determine...
Interactive
Curated OER

Exterior Angles of Polygons

For Students 9th - 12th
In this online math worksheet, high schoolers find the exterior angles of polgyongs. This excellent resource allows the students to check their answers, and to get "hints" should they run into difficulties. A terrific teaching tool!
Lesson Plan
Curated OER

Metallic Mosaic

For Teachers 4th - 5th
Students engage in a instructional activity about polygons while creating a mosaic pattern. They concentrate upon creating a pattern that is geometric and has the look of a quilt design. The instructional activity includes steps to...
Worksheet
Curated OER

Countdown Challenge: Live Symmetry in Regular & Irregular Polygons

For Students 7th - 8th
In this symmetry worksheet, students identify lines of symmetry in given polygons. They discover the correlation between the number of sides and the number of lines of symmetry. Students determine the lines of symmetry in irregular...
Worksheet
Curated OER

Isosceles Right Triangle

For Students 10th
In this isosceles right triangle worksheet, 10th graders solve and complete 5 different constructions of composition and decomposition. First, they make 4 congruent isosceles triangles with the model on the left. Then, students create...
Worksheet
Curated OER

Countdown Challenge Symmetry

For Students 6th - 8th
In this symmetry worksheet, learners identify the lines of symmetry in given polygons. They match the number of lines of symmetry to the correct figure. This one-page worksheet contains seven problems.
Worksheet
Curated OER

Symmetry Fun

For Students 7th
In this symmetry worksheet, 7th graders identify and complete 12 different lines of symmetry in polygons. First, they color all of the polygons that have a line of symmetry. Then, students circle all of the regular polygons and use the...
Worksheet
Curated OER

Measurement: Perimeter

For Students 10th
In this perimeter instructional activity, 10th graders identify and complete 9 different problems that include determining the perimeter of various figures. First, they complete the table by writing the number of sides in each figure...
Lesson Plan
Curated OER

Tessellations: Geometry and Symmetry

For Teachers 8th - 10th
Learners explore the concept of tessellations. In this tessellations lesson, students use an applet to construct tessellations. Learners use regular polygons to construct tessellations. Students find patterns and symmetry in their...
Worksheet
Curated OER

Perimeter of Polygons in Word Problems

For Students 2nd - 4th
Peruse these perimeter word problems with beginning geometers, possibly projecting it as an all-class warm up. There are three scenarios here, each with a visual. Scholars determine the perimeter of a swimming pool, find the missing...
Lesson Plan
Curated OER

Space and Shape in Geometry:

For Teachers 7th - 12th
Students are asked to visualize three-dimensional figures and apply this visualization to problem solving.
Worksheet
Curated OER

Area of Polygons

For Students 6th - 8th
In this math worksheet, learners find the area and perimeter of the regular and irregular polygons. They pay attention to use the proper measurements for calculation.
Interactive
Curated OER

Interior Angles of Polygons

For Students 9th - 12th
In this online math worksheet, high schoolers determine the interior angles of polygons given their exterior measurements. This excellent resource allows the students to check their answers, and to get "hints" should they run into...
Worksheet
Curated OER

Visualize 3-D Objects and Make Nets of Common Solids

For Students 4th - 5th
In this 3-D objects and common solids worksheet, students cut out and count the number of faces on several different types of boxes and make a cuboid from straws or a card. Students fill out 4 different categories involving 5 different...
Worksheet
Curated OER

Math Vocabulary Decoding Activity

For Students 5th - 6th
For this math vocabulary worksheet, learners use a letter key code to match match vocabulary words to their definitions. A reference web site it given for additional activities.