A triangle is created of 3 line segments. The heat segments intersect in your endpoints. To name a triangle we frequently use the vertices (the surname of the endpoints). The triangle below is called ABC.
You are watching: A triangle with at least two congruent sides
A triangle has three angles. The sum of the steps of the angles is always 180° in a triangle.
We have actually different species of triangles. A triangle is classified by its angles and also by the variety of congruent sides.
A triangle that has actually three acute angels is referred to as an acute triangle.
A triangle that has actually one appropriate angle is called a appropriate triangle.
A triangle that has one obtuse edge is dubbed an obtuse triangle.
When a triangle has three congruent sides, we speak to the triangle an it is intended triangle. We note the congruent political parties by a cut mark. The angle in an it is provided triangle are always 60°.
When a triangle has two congruent sides it is called an isosceles triangle. The angle opposite to the two sides of the same size are congruent.
A triangle without any kind of congruent sides or angle is called a scalene triangle.
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When 2 triangles space congruent it means that they have the exact same size and also shape. This means that they have the same angles. The red cut marks show us i m sorry sides and also angles that are congruent Congruency is displayed by this symbol
$$\beginmatrix A\cong X & & AB\cong XY\\ B\cong Y & & BC\cong YZ\\ C\cong Z & & AC\cong XZ \endmatrix$$
Triangles that have congruent angles yet not the very same size are dubbed similar. Comparable triangles have sides that room proportional. Similarity is displayed by this symbol
$$\bigtriangleup ABC\sim \bigtriangleup XYZ$$
$$A=X,\: \: B=Y,\: \: C=Z$$
Find x in the comparable triangles.
We recognize that due to the fact that the triangle are comparable the sides space proportional which means that
Find out whether the triangles room right, isosceles, acute, scalene, obtuse or equilateral