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Isosceles & Equilateral Triangle

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Cookies are not enabled on your browser. Please enable cookies in your browser preferences to continue. Sorry, this site will not function correctly without javascript. The scripts we use are safe and will not harm your computer in any way. Please enable javascript in your browser. Online Geometry Tutoring and Homework Help. Search by your textbook and page number. Adding and Subtracting Integers 1.

Multiplying and Dividing Integers 2. Equations Involving the Distributive Property 3. Equations with the Variable on Both Sides 4. Points, Lines, Planes, and Space 5. Segments, Rays, and Length 6. Segment Addition Postulate and Midpoint 7.

Angles and Measure 8. Angle Addition Postulate and Angle Bisector 9. Algebra Proofs with Properties Geometry Proofs with Midpoints and Angle Bisectors Solving Systems by Addition Solving Systems by Substitution and Method of Choice Factoring Trinomials and Difference of Two Squares Complementary and Supplementary Angles Advanced Complementary and Supplementary Angles Problems Involving Perpendicular Lines Theorems Involving Perpendicular Lines Parallel Lines Vocabulary Given Lines are Parallel Equilateral triangle is when all three sides are congruent.

Also when all three sides are marked, an equilateral triangle can be drawn one way, noticing that the each of the angles is acute. The key concept here is number congruent sides. The number congruent sides always tell us how many congruent angles we have. In Isosceles triangle if there are two congruent sides then there will be two congruent angles. Where as in equilateral triangle all the three sides are congruent thus will have all three congruent angles. In isosceles triangle where two sides are marked congruent.

Here the base of the side is not congruent to the other two or not equal length of the other two sides. The base angles are congruent for an isosceles triangle.

The congruent sides are always opposite to the congruent angles in isosceles triangle. For equilateral triangles, the angles are opposites are congruent in all the three sides. As all three sides are congruent, that means all three angles are also congruent. So if we consider that the sum of all the angles is degrees, and all three angles are congruent.

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