# Types of trinagles. This lesson introduces different types of triangles. We'll discuss some different characteristics that are common to all triangles and some.

## Types of trinagles. Equilateral, Isosceles and Scalene. There are three special names given to triangles that tell how many sides (or angles) are equal. There can be 3, 2 or no equal sides/angles: What Type of Angle? Triangles can also have names that tell you what type of angle is inside.

Triangles can be classified by various properties relating to their angles and sides. The most common classifications are described on this page. The Equilateral triangle shown on the left has three equal sides and three equal angles. The Isosceles triangle shown on the left has two equal sides and two equal angles.

The Scalene Triangle has no congruent sides. In other words, each side must have a different length.. In the picture on the left, the shaded angle is the obtuse angle that distinguishes this triangle. What kind of triangle is pictured on the left? What type of triangle is pictured on the left? Since this triangle has two congruent angles and two congruent sides, it is an Isosceles Triangle. Assuming the picture is to scale, the triangle on the right is definitely obtuse see the blue angle as well as scalene.

Assuming the picture is to scale, the triangle on the right is definitely acute as well as scalene. Make a Graph Graphing Calculator. Practice Identifying Triangle Types. Online Triangle Calculator Triangle and its properties. Practice 1 What kind of triangle is pictured on the left? Acute Triangle and scalene. Practice 2 What kind of triangle is pictured on the left? Practice 3 What type of triangle is pictured on the left? Practice 4 Classify the triangle on the left Triangle type. Surface area of a Cylinder.

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