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On the basis of sides, triangles are classified into 3 types. Equilateral triangle: When all three sides have the same length, the triangle is considered to be an equilateral triangle. Isosceles triangle: If two sides of a triangle are equal, it is called an isosceles triangle. Scalene triangle: If all the sides of a triangle are of different ...
- Right Triangles. A right triangle has one 90° angle and a variety of often-studied topics: Pythagorean Theorem. Pythagorean Triplets. Sine, Cosine, Tangent. Pictures of Right Triangles.
- Equilateral triangle. The Equilateral triangle shown on the left has three congruent sides and three congruent angles. Each angle is 60°.
- Isosceles triangle. The Isosceles triangle shown on the left has two equal sides and two equal angles.
- Scalene Triangle. The Scalene Triangle has no congruent sides. In other words, each side must have a different length.
In the above triangle, one among the three angles is 90 degrees, thus it is a right triangle. Video Lesson on Types of Triangles. Geometry is all about shapes like square, circle, rectangle, triangle and so on. Among all the shapes that we have listed here, triangles seem to be fun and different.
- 6 min
Jan 21, 2020 · 2. Classifying Triangles by Angles. Triangles can also be classified by their angles. In an acute triangle all three angles are acute (less than 90 degrees). A right triangle contains one right angle and two acute angles. And an obtuse triangle contains one obtuse angle (greater than 90 degrees) and two acute angles.
6. Classify the triangle with angles of measure 45, 45, and 90: Answer: This triangle is a right triangle. 7. Classify the triangle with sides of length 5, 7, and 6: Answer: This triangle is an acute scalene triangle. 8. Classify the triangle with angles of measure 40, 40, and 100: Answer: This triangle is an obtuse isosceles triangle. 9.
Oct 26, 2023 · Triangles, with their three sides and three angles, are one of the most fundamental shapes in geometry. But did you know not all triangles are created equal? Depending on the lengths of their sides and the measures of their angles, triangles can be classified into different types, each with its own unique set of properties.
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Solution: Step 1: Let the angles of the triangle be a, b and c. Let a be the obtuse angle. Step 2: The sum of all the angles in any triangle is 180°. a + b + c = 180°. If a > 90° then b + c must be less than 90°. Therefore, b and c must be acute angles. Answer: No, a triangle can only have one obtuse angle.
