19. ¿Qué tipo de triángulo tiene todos sus lados de igual longitud? Triángulo isósceles Triángulo equilátero Triángulo escaleno Triángulo rectángulo

## Step 1The problem is asking us to identify the type of triangle that has all its sides of equal length. The options provided are: Isosceles triangle, Equilateral triangle, Scalene triangle, and Right triangle.## Step 2An isosceles triangle has two sides of equal length, but not all three. Therefore, it does not meet the criteria of the problem.## Step 3A scalene triangle has all sides of different lengths, so it also does not meet the criteria of the problem.## Step 4A right triangle has one right angle, but the lengths of its sides can vary. Therefore, it does not meet the criteria of the problem.## Step 5An equilateral triangle has all sides of equal length, which meets the criteria of the problem.