Which of the triangles in the diagram are congruent?

Triangle 1, triangle 3 and triangle 4 are congruent triangles bases on side-side-side and side-angle-side congruency.
Triangle is a polygon that has three sides and three angles. Types of triangles are isosceles, equilateral and scalene triangle.
Two triangles are said to be congruent if they have the same shape and their corresponding sides are congruent to each other. Also, their corresponding angles are congruent.
Triangle 1, triangle 3 and triangle 4 are congruent triangles bases on side-side-side and side-angle-side congruency.
Find out more on congruent triangles at: https://brainly.com/question/2938476
#SPJ1