What can symmetry tell us about triangles? After looking at four examples, learners will come to realize that lines of symmetry are different for equilateral, isosceles, and scalene triangles. Use this guided practice activity as an...

Why are there so many different types of triangles? Be that as it may, beginning geometers need to understand the differences between equilateral, isosceles, scalene, and right triangles, and they get a visual approach with this...

Students investigate triangles. In this shapes geometry lesson plan, students define and state the attributes for equilateral, scalene, and isosceles triangles. Students locate the prefix "tri" in a variety of words and make connections...

Lots of details about arranging flowers in particular shapes will be interesting for students in vocational classes or working towards professional qualifications. There are some pictures to illustrate the different designs, but your...

In this triangle activity, students observe pictures of triangles. They name the triangles according to the length of their sides. Twelve right, equilateral and isosceles triangles are provided for identification on this one-page...

In this triangles practice worksheet, students respond to 4 questions that require them to identify the pictured triangles as acute, right, obtuse, scalene, isosceles, or equilateral triangles.

Students explore differents types of triangles and quadriaterals. In this polygon lesson, students  model identify and compare two and three dimensional geometric figures. Students create tangrams and discover the difference between...

Build on your learners' previous knowledge of geometric shapes and symmetrical figures. Then set them out to take photos of geometric shapes on campus. They assess whether the photos contain symmetry or not. 

Students measure using the Pythagorean Theorem. In this geometry lesson plan, students solve right triangles using the properties of the Pythagorean theorem. They apply the same knowledge to solving story problems.

In this math worksheet, students analyze 15 pictures of geometric figures and match them to the names which are provided in a word bank. Students tell how many lines of symmetry each shape has.

In this math worksheet, students explore geometric shapes by completing a variety of exercises. Students label the pictures with the 3D shape names, draw radius and diameter lines, name different types of triangles and draw diagonals and...

Fifth graders explore geometric building blocks in the real world in order to describe the characteristics and relationships of points, lines, line segments, rays, and planes. This is the first lesson plan in a series of lessons in...

Fifth graders, after seeing Honeycomb examples, complete a Classifying Angles worksheet, Clock worksheet, and Defining Angles worksheet.

Fifth graders work with polygons.

This site provides the definition of Scalene triangles.

This Oswego City School District site from the Regents Exam Prep Center provides an explanation of the classifications of triangles both by sides and by angles. Pictures are also included.