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# Find Missing Angle Worksheet

## 8 problems   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.

Triangle Theorems
8.G.A.5

To solve this worksheet, students should remember that the sum of all interior angles of a triangle is 180 degrees. For example, if the three angles of a triangle are x°, 30°, and 80°, then the equation formed by using the triangle property is x+30+80=180. After simplification, the equation becomes x+110=180, then x=70. Therefore, the missing angle of the triangle is 70°.

To solve this worksheet, students should remember that the sum of all interior angles of a triangle is 180 degrees. For example, if the three angles of a triangle are x°, 30°, and 80°, th...

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