Math Drills
Angles of a Triangle
3Calculation
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What this worksheet covers
- Worksheet
- Angles of a Triangle
The three angles of a triangle come to 180 degrees when added. On that one fact alone, the remaining angle is found as Calculation. Isosceles and equilateral triangles carrying marks for equal angles appear, and some questions find an exterior angle at the end of an extended base through a two-tier expression.
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Miss the marks on a figure with equal angles and the answer becomes the single angle shown subtracted from 180 degrees. Follow the marks, write figures into all three angles of the drawing and add them: exactly 180 degrees if the work is right, and more than 180 degrees if a mark was missed.
From the overlapping of shapes seen in Congruent Figures, the work now enters the stage of finding an angle size as a figure. Angles of a Quadrilateral widens the same method to a figure with one more angle.
- Interior Angles2 questions
- Exterior Angles2 questions
