Classify the indicated triangular shape by its sides and by its angles. acute scalene
equangular equilateral
acute isosceles
obtuse isosceles

Step-by-step explanation:

step 1. all the side length are different therefore all of the internal angles are different.

step 2. a triangle with all different angles is scalene.

step 3. all of the angles are less than 90°

step 4. a triangle with all angles less than 90° is acute.

need more information

step-by-step explanation:

it would open into a square depending on the type of envelope i’m not sure about the second part