Looking at the image provided, you can see that there are two congruent angles (50 degrees) and the two congruent sides (5.26), making the triangles isosceles.
An isosceles triangle is when there are two congruent sides.
Next, by looking at the angle measurements, you can determine that the triangle is acute because the angles are all below the degree of 90.
An acute triangle is when all the angles are below the degree of 90, but still add up together to make a degree of 180.
