Triangles : généralités


What are the characteristics of a right triangle?

All corners are right angles and all sides are equal. The diagonals cross at right angles at the center of the square. A rectangle has four sides. All the four corners are right angles. Opposite sides are equal in length. It has two pairs of parallel sides. Page 47 1. right triangle, isosceles 2. isosceles acute triangle 3.

How do you classify a triangle?

Classification of Triangles by Sides. Equilateral triangle: a triangle with three congruent sides Isosceles triangle: a triangle with at least two sides congruent Scalene triangle: a triangle with no two sides congruent Another way to classify triangles is according to their angles.

What is an isosceles triangle?

An isosceles triangle is a triangle with two equal sides. An isosceles triangle also has two equal angles because it has two equal sides. Angles that are opposite equal sides are also equal. Side MO= Side ON Mis opposite side ON

What does the length of a triangle's sides tell you?

Knowing the lengths of a triangle’s sides can tell you something about its angles. The longest side of a triangle is the side opposite the largest angle. The shortest side is the side opposite the smallest angle. Examining Triangles Here are some examples showing the link between the length of a triangle’s sides and its angles.

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