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Isosceles Triangle | Definition, Properties & Examples
Isosceles Triangle Theorem. The isosceles triangle theorem is a fundamental theorem that outlines one of the most important properties of an isosceles triangle. It states that the angles located ...

What is an Isosceles Trapezoid? - Study.com
An isosceles trapezoid is a quadrilateral having the following properties: One pair of parallel sides (AB and DC) One pair of congruent legs (DA and CB) Base angles are congruent (m

Proofs & Angles of an Isosceles Trapezoid | Overview & Diagram
An isosceles trapezoid is a four-sided shape with one pair of parallel sides and non-parallel sides that are equal. In order to prove that a trapezoid is an isosceles trapezoid, ...

Proving Congruent Isosceles Triangles - Lesson | Study.com
A statement of the form "if p, then q" has as its inverse the statement "if q, then p". The isosceles triangle theorem and the base angles theorem are converses of each other.

How to Find Side Lengths & Angle Measures of Isosceles & Equilateral ...
Isosceles Triangle: An isosceles triangle is a triangle with two sides of equal length, called legs. The angle between these two sides is called the vertex angle, and the other two angles are ...

Isosceles Triangle Lesson for Kids - Study.com
An isosceles triangle has two sides that are the same length and one side that is a different length. Because the slash marks are the same, we know that the two sides are equal in this triangle ...

Area of an Isosceles Triangle | Formula & Examples
An isosceles triangle is a triangle that has two equal sides known as the legs and two equal angles. The side that is different that the matching sides is known as the base and three vertices ...

Vertex Angle of an Isosceles Triangle | Definition & Examples
An isosceles triangle is a special type of triangle in which two sides are congruent. An easy way to remember that an isosceles triangle has two equal sides is the phrase "I saw some sleeves ...

How to Solve for Values in an Isosceles Triangle Using the Pythagorean ...
Given the isosceles triangle shown, determine the length of side AC using the Pythagorean Theorem. Line {eq}BD {/eq} is the height from vertex {eq}B {/eq} to side {eq}AC {/eq}. Step 1: Identify ...

How to Identify Scalene, Isosceles & Equilateral Triangles from ...
Isosceles Triangle: An isosceles triangle is a triangle that has two sides with the same length, and therefore two angles with the same value. Equilateral Triangle: ...