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 44 Views 95 Downloads CCSS: Designed
How many isosceles triangles can you find?
Seventh graders recognize the characteristics of isosceles triangles. In this isosceles triangle activity, 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
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 3 Views 2 Downloads CCSS: Designed
How many isosceles Triangles Can You Find?
Fifth graders solve problems while examining a variety of isosceles triangles. In 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
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
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
Triangles Sides and Angles
Students explore the concept of triangles. In this triangles instructional activity, students prove and apply the Isosceles Triangle Theorem using Cabri Jr. on the graphing calculator. Students construct triangles and measure the angles. Students drag the points of the triangle to notice the relationship in angle measure.
9th - 12th Math 10 Views 156 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
High schoolers construct triangles using Cabri Jr. In this constructing triangles using Cabri Jr. lesson, students construct isosceles triangles. High schoolers 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
In this geometry worksheet, 10th graders explore triangle properties, including the sum of the measures of the angles of a triangle, the triangle inequalities, properties of isosceles triangles, properties of congruent triangles, and flowchart proofs.
10th Math 14 Views 130 Downloads
Geometry Journal: Isosceles Triangles
For this isosceles triangles worksheet, students 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
Students investigate triangles. In this shapes geometry lesson, 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 with the relationship to "three.
K - 2nd Visual & Performing Arts 3 Views 11 Downloads
Isosceles Triangle Theorems
In this isosceles triangle worksheet, students use theorems to determine if given triangles are congruent or not congruent. In addition, they identify the described triangles as isosceles or right. This one-page worksheet contains ten problems.
10th - 11th Math 3 Views 22 Downloads
The Isosceles Triangle Problem
In this geometry worksheet, 10th graders solve a problem involving an isosceles triangle. The problem appears to be deceptively easy, but instead requires the use of trigonometry to arrive at a correct solution. The one page worksheet contains one problem with solution.
10th Math 3 Views 0 Downloads
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 students.
9th - 11th Math 19 Views 23 Downloads CCSS: Designed