In 8th Grade, students learn various properties and theorems of triangles. According to one property of a triangle, the sum of all interior angles of a triangle is 180°. This property can be used to find the missing angles of a triangle. Teachers can use “Find missing angle worksheet” to help their students understand the triangle properties and theorems. In this worksheet, two interior angles of a triangle are given and students are asked to find the missing angle.

Grade 8

Triangle Theorems

8.G.A.5