Since all the three angles in an equilateral triangle are equal, we write it as: Now, we know that the sum of angles in a triangle is 180°. Solved Question for You Question 1: An equilateral triangle can also be called an acute angle, why?Īnswer: All the three sides and angles of an equilateral triangle are equal. Now, every triangle is not just a triangle for you. Therefore, the above classification will now make it easier for you to differentiate between triangles. When we learn about the various types of triangles, we keep in mind the measurement of sides and angles. Therefore, each angle will be exactly 60°. Therefore, this is the triangle which consists of three angles all of below 90°. Acute TriangleĪn acute triangle is a triangle which consists of three acute angles. The obtuse angle is the angle that measures above 90°. This is a triangle with two acute angles and one obtuse angle. The following figure shows the right triangle. Thus, the Right triangle is a triangle with one angle of 90°, and the other two angles that measure less than 90°. The right angle is an angle that measures 90° and the acute angles are those angles that measure less than 90°. This triangle consists of one right angle and two acute angles.

Following is the figure of the scalene triangle: Types of Triangles by Angles Right Triangle Each line of this triangle is of different length. The triangle with no equal sides is the scalene triangle. The following figure is of the isosceles triangle. Not only two equal sides, but the isosceles triangle also consists of two equal angles. The triangle with only two equal sides is known as the isosceles triangle. The following figure is an equilateral triangle –

Every side of the triangle is of the same length and every angle is of the same measure of 60°. This type of triangle consists of three equal sides and equal angles. Types of Triangles with Respect to Sides Equilateral Triangle The following are the details about each classification: Browse more Topics under Understanding Elementary Shapes Now, triangles can be classified according to their sides and interior angles. The main properties of the triangle are that the sum of the interior angle of the triangle is 180° and the sum of the exterior angles is always 360°. This closed figure consists of three lines that are linked at the endpoint to each other.

Types of isosceles triangle