We found 120 resources with the concept triangle properties
Triangle Proportionality: Lesson
3 mins 7th - 11th CCSS: Adaptable
New ReviewLook at proportionality from a parallel perspective. A section of an expansive geometry playlist introduces the Triangle Proportionality Theorem. Using the theorem, the video shows how to determine missing measurements in triangles.
Comparing Triangle Angles and Sides: Lesson
5 mins 7th - 11th
New ReviewUse the opposite to organize angles or sides. The video provides the relationship of angle measures based on the lengths of sides in a triangle and its converse. Using two triangles, the segment of a larger playlist on geometry shows the...
Triangle Inequality Theorem: Lesson
5 mins 6th - 12th CCSS: Adaptable
New ReviewCan any three lengths make a triangle? One of the videos in a playlist on basic geometry introduces the Triangle Inequality Theorem. Using three given lengths, the presentation illustrates the restrictions on lengths of any side of a...
4 mins 6th - 11th CCSS: Adaptable
New ReviewFind the location of altitudes—from any elevation! The video presents the definition of an altitude of a triangle. By drawing examples, the segment of a larger geometry playlist highlights the location of altitudes of various triangle...
Equilateral Triangles: Lesson
3 mins 8th - 11th CCSS: Adaptable
New ReviewTake 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,...
The Third Angle Theorem: Lesson
3 mins 8th - 11th CCSS: Adaptable
New ReviewIf two sets of angles are equal, the third set is too. An informative portion of a playlist on geometry develops the Third Angle Theorem for triangles. Using the theorem, the presenter shows how to determine the measure of missing angles...
Angle Bisectors: Lesson
4 mins 8th - 11th CCSS: Adaptable
New ReviewApply bisectors and distances to angles. Using the definition of an angle bisector, a portion of a geometry playlist draws a diagram showing the angle bisector. The video details properties of an angle bisector and their converses....
Midsegment Theorem: Lesson
2 mins 8th - 11th CCSS: Adaptable
New ReviewUse half the length to connect the midpoints. A section of a playlist on geometry introduces the concept of a midsegment of a triangle and how to find it. The video states the properties of the midsegment which make up the Midsegment...
Exterior Angles Theorems: Lesson
5 mins 9th - 12th CCSS: Adaptable
New ReviewUse the inside to find the outside. The resource presents two theorems dealing with exterior angles of a triangle. Using the two theorems, the segment from a larger geometry playlist works problems to solve for angle measures.
Geometer Sherlock: Triangle Investigations
8th - 10th CCSS: Designed
New ReviewDeduce 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...
Conditions on Measurements That Determine a Triangle
7th CCSS: Designed
Can any three side lengths create a triangle? Your classes tackle this question and more in the 11th lesson of the 29-part module. Through modeling with patty paper, individuals discover the relationship between the lengths of the sides...