Triangles

These line segments can form a triangle because each side of the triangle can be a different length.

These line segments can form a triangle because the longest side of the triangle is longer than 8 inches.

These line segments cannot form a triangle because at least two sides of the triangle must be the same length.

These line segments cannot form a triangle because the longest side of the triangle must be shorter than 8 inches.

$$20\degree$$  

$$70\degree$$  

$$90\degree$$  

$$180\degree$$  

sum

angles

squares

$$180\degree$$  

$$100\degree$$  

$$46.5\degree$$  

$$33.5\degree$$  

$$133.5\degree$$  

$$140.4\degree$$  

$$180\degree$$  

$$70.2\degree$$  

$$39.6\degree$$  

25°, 45°, 110°

34°, 66°, 80°

11°, 12°, 157°

50°, 55°, 65°