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°, 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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