 # What Is A Triangle With 2 Congruent Sides?

## How do you know if 2 triangles are congruent?

ASA stands for “angle, side, angle” and means that we have two triangles where we know two angles and the included side are equal.

If two angles and the included side of one triangle are equal to the corresponding angles and side of another triangle, the triangles are congruent..

## What are the 2 congruent sides of an isosceles triangle?

The congruent sides of the isosceles triangle are called the legs. The other side is called the base. The angles between the base and the legs are called base angles. The angle made by the two legs is called the vertex angle.

## What is a triangle with 3 congruent sides?

When a triangle has three congruent sides, we call the triangle an equilateral triangle. We mark the congruent sides by a slash mark. The angles in an equilateral triangle are always 60°. When a triangle has two congruent sides it is called an isosceles triangle.

## What are the examples of congruent triangles?

The Angle – Angle – Side rule (AAS) states that, two triangles are congruent if their corresponding two angles and one non- included side are equal. Illustration: Given that; ∠ BAC = ∠ QPR, ∠ ACB = ∠ RQP and length AB = QR, then triangle ABC and PQR are congruent (△ABC ≅△ PQR).

## Can triangles be congruent by AAA?

If the three angles (AAA) are congruent between two triangles, that does NOT mean that the triangles have to be congruent. They are the same shape (and can be called similar), but we don’t know anything about their size.

## How do you prove triangles are congruent?

Angle-side-angle is a rule used to prove whether a given set of triangles are congruent. If two angles and the included side of one triangle are equal to two angles and included side of another triangle, then the triangles are congruent.

## Is a triangle with 2 congruent sides unique?

A triangle with two congruent sides is called isosceles. A triangle with three congruent sides is a special type of isosceles triangle and is more specifically called equilateral.

## How do you find the side of a two sided isosceles triangle?

To find an unknown side of a triangle, you must know the length of other two sides and/or the altitude. To find the unknown base of an isosceles triangle, using the following formula: 2 * sqrt(L^2 – A^2), where L is the length of the other two legs and A is the altitude of the triangle.

## What do lines on the side of a triangle mean?

Little tick marks are used to show that two sides are the same length (congruent). You can use just one tick mark, two or three or more — just as long as you use the same number on sides that are equal.

## What is a true triangle?

A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry. A triangle with vertices A, B, and C is denoted .

## What is a congruent side of a triangle?

When two triangles are congruent they will have exactly the same three sides and exactly the same three angles. The equal sides and angles may not be in the same position (if there is a turn or a flip), but they are there.

## What do congruent sides mean?

Angles are congruent when they are the same size (in degrees or radians). … Sides are congruent when they are the same length.

## How do you classify a triangle by its sides?

Classifying a triangle is as simple as comparing the sides. If all three sides have the same length then it is an EQUILATERAL triangle, if only two sides have the same length then it is an ISOSCELES triangle and if there are no sides that have the same length then it is a SCALENE triangle.

## Can 1 acute and 2 obtuse form a triangle?

A right triangle will have 1 right angle and 2 acute angles. An obtuse triangle will have 1 obtuse triangle and 2 acute angles.