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Common Core Standard 8.G.A.5 Questions

Use informal arguments to establish facts about the angle sum and exterior angle of triangles, about the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles. For example, arrange three copies of the same triangle so that the sum of the three angles appears to form a line, and give an argument in terms of transversals why this is so.

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Grade 8 Angles CCSS: 8.G.A.5
In the figure below, if angle 1 is [math]100deg[/math], what is the measure of angle 5?
Parallel Lines - Skew Transversal
  1. [math]80deg[/math]
  2. [math]100deg[/math]
  3. [math]110deg[/math]
  4. [math]140deg[/math]
Grade 8 Points, Lines, and Planes CCSS: 8.G.A.5
Which set of angles is an example of corresponding angles?
Parallel Lines - Skew Transversal
  1. [math]ang1 and ang2[/math]
  2. [math]ang4 and ang5[/math]
  3. [math]ang6 and ang8[/math]
  4. [math]ang3 and ang7[/math]
Grade 8 Points, Lines, and Planes CCSS: 8.G.A.5
Which of the following correctly classifies the relationship between [math]ang4[/math] and [math]ang5[/math]?
Parallel Lines - Perpendicular Transversal
  1. alternate interior angles
  2. same-side interior angles
  3. corresponding angles
  4. vertical angles
Grade 8 Triangles CCSS: 8.G.A.5
The exterior angle of a triangle is equal to                                                    .
  1. the value of its adjacent angle
  2. the sum of its opposite interior angles
  3. the product of its opposite interior angles
  4. the difference between its opposite interior angles
Grade 8 Triangles CCSS: 8.G.A.5
What is the sum of the exterior angles of a triangle?
  1. [math]180deg[/math]
  2. [math]270deg[/math]
  3. [math]360deg[/math]
  4. [math]540deg[/math]
Grade 8 Triangles CCSS: 8.G.A.5
Which of the following statements about the exterior angle of a triangle is true?
  1. it is always equal to the value of its adjacent angle
  2. it is always larger than either opposite interior angle
  3. it is always larger than the sum of its opposite interior angles
  4. it is always equal to the sum of the interior angles of the triangle
Grade 8 Points, Lines, and Planes CCSS: 8.G.A.5
Grade 8 Triangles CCSS: 8.G.A.5
Grade 8 Points, Lines, and Planes CCSS: 8.G.A.5
If [math]ang2[/math] is perpendicular to line k and line m is parallel to line k, then which statement is correct?
Parallel Lines - Perpendicular Transversal
  1. [math]ang6[/math] must equal [math]90deg[/math]
  2. [math]ang6[/math] may equal [math]90deg[/math]
  3. [math]ang6[/math] cannot equal [math]90deg[/math]
  4. Not enough information to determine
Grade 8 Triangles CCSS: 8.G.A.5
What is the measure of one external angle of an equilateral triangle?
  1. [math]30deg[/math]
  2. [math]60deg[/math]
  3. [math]120deg[/math]
  4. [math]180deg[/math]
Grade 8 Triangles CCSS: 8.G.A.5
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