We found 127 reviewed resources for isosceles triangles properties
Base Angles of Isosceles Triangles
9th - 10th CCSS: Designed
Build confidence in proofs by proving a known property. Pupils explore two approaches to proving base angles of isosceles triangles are congruent: transformations and SAS. They then apply their understanding of the proof to more complex...
The Isosceles Triangle Theorem is Actually Really Simple!
7 mins 9th - 12th CCSS: Adaptable
The isosceles triangle comes with its own set of properties. A lecturer shows how to apply the Isosceles Triangle Theorem to find missing side lengths or angle measures. The final example involves both square roots and quadratic equations.
Equilateral Triangles: Lesson
3 mins 8th - 11th CCSS: Adaptable
Take a second look at triangles that are equal all the way around. The video reminds viewers what an equilateral triangle is and points out that the three angles are the same. Using the fact that equilateral triangles are also isosceles,...
How Do You Find Missing Angles in an Isosceles Triangle Using Right Triangles?
4 mins 6th - 8th
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...
How Do You Find Missing Angles in an Isosceles Triangle?
4 mins 6th - 8th
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...
Investigation of Special Segments of Triangles
9th - 12th CCSS: Designed
Don't miss a special resource on special segments. Scholars use paper folding to investigate medians, altitudes, and angle bisectors of triangles. They discover that each set of segments intersect at a specific point (centroid,...
Geometer Sherlock: Triangle Investigations
8th - 10th CCSS: Designed
Deduce quite elementary relationships within triangles. Small groups work through three investigations of triangles. The investigations use patty paper to determine the Triangle Sum Theorem and the relationship between the angle size and...