Isosceles Triangle Teacher Resources
Find Isosceles Triangle educational ideas and activities
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Theorems of Triangles
Show your school spirit while proving theorems about triangles! Your student geometers are charged with coming up with a new design for the school pennant, following specific guidelines. Along the way, they need to prove the theorem that base angles of an isosceles triangle are congruent.
9th - 11th Math 51 Views 102 Downloads CCSS: Designed
Your young designers use geometric concepts and isosceles triangle properties to create a blue print for a pennant with specific criteria. Second, they write a geometric proof outlining the correlation between base angle measures and the side measures of their pennant.
9th - 11th Math 5 Views 2 Downloads CCSS: Designed
How many isosceles triangles can you find?
Seventh graders recognize the characteristics of isosceles triangles. In this isosceles triangle lesson plan, 7th graders use geoboards to create isosceles triangles. Students record results and explain why they have an isosceles triangle.
7th Math 4 Views 19 Downloads
SAT Prep: Test 1 Section 9 Part 3
If it takes a long time to complete the problems on the math SAT, it doesn't matter if they are correct - the problems that are left over will count against the student's score. Sal takes care to show quicker ways to complete problems and to get the same answers.
10 mins 9th - 12th Math 3 Views 1 Download
Reflections and Isosceles Triangles
Geometers explore symmetries of isosceles triangles by using rigid transformations of the plane. They complete four tasks, including congruence proofs, which illustrate the relationship between congruence and rigid transformations. The activity requires a thorough understanding of the definition of reflection about a line and is better suited for more sophisticated geometry learners.
9th - 11th Math 21 Views 24 Downloads CCSS: Designed
How Do You Find Missing Angles in an Isosceles Triangle?
Finding the missing values of two angles in an isosceles triangle is not as difficult as it sounds. But how can two out of three angle's measurements be found? Well, there are special properties about an isosceles triangle which make this problem solvable.
4 mins 6th - 8th Math 3 Views 0 Downloads
Geometry Journal: Isosceles Triangles
In this isosceles triangles worksheet, pupils justify and determine the symmetry of an isosceles triangle. They explore the bisector of rectangles. This three-page worksheet contains two problems. Answers are listed on page three.
10th - 12th Math 3 Views 10 Downloads
How Do You Find Missing Angles in an Isosceles Triangle Using Right Triangles?
Given an isosceles triangle, and the value of one angle, find the missing values. There are some special properties about isosceles triangles. Use the triangle sum theorem to solve this problem. Watch this video to see how the instructor sorts it all out step-by-step as she demonstrates how to use the special properties as related to a right triangle.
4 mins 6th - 8th Math 3 Views 0 Downloads
How many isosceles Triangles Can You Find?
Fifth graders solve problems while examining a variety of isosceles triangles. For this isosceles triangle lesson, 5th graders examine shapes to find their characteristics. Students pay particular attention to the characteristics of isosceles triangles and solve problems related to them.
5th Math 3 Views 24 Downloads
In need of a fun way to define an isosceles triangle? This activity has learners fold a paper in half and then cut it to create an isosceles triangle. They determine the line of symmetry by folding the triangle in half and then use the properties they've discovered to identify other isosceles triangles.
4th - 5th Math 3 Views 2 Downloads
Communicating Mathematics Through Technology - Project 2
Students explore the concept of triangles. In this triangles lesson, students use Geometer's Sketchpad to explore characteristics of isosceles triangles and right triangle trigonometric ratios. Students measure lengths of sides and angle degrees.
9th - 12th Math 3 Views 11 Downloads
Getting Started with Triangles
Students construct triangles using Cabri Jr. For this constructing triangles using Cabri Jr. lesson, students construct isosceles triangles. Students use two radii of a circle to construct an isosceles triangle. Students measure the angles of their triangle construction and make conjectures about isosceles triangles.
9th - 12th Math 3 Views 1 Download
Learners explore the difference between a construction and a drawing. They focus on various ways to construct different types of triangles. The lesson is an application of Cabri Jr. and reinforces the difference between a constructions and a drawing.
10th Math 3 Views 1 Download CCSS: Designed
Classify Triangles - Problem Solving 15.3
Fourth and fifth graders count and label triangular figures, compare a square and equilateral triangle, explain classifications of triangles, and solve a word problem about an isosceles triangle. There are four critical-thinking questions to answer.
4th - 5th Math 3 Views 103 Downloads