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Worksheet for calculating missing interior angles in triangles, with nine problems requiring students to use the 180° triangle angle sum property.

Worksheet titled "Calculating the missing angle in a triangle (Interior Angles)" with nine triangles, each showing two angles and asking to find the missing third angle, using the rule that all angles in a triangle add up to 180°.

Worksheet titled "Calculating the missing angle in a triangle (Interior Angles)" with nine triangles, each showing two angles and asking to find the missing third angle, using the rule that all angles in a triangle add up to 180°.

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