Classifying Triangles (Grade 4)

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Classifying Triangles

1. 
What kind of triangle is shown?
Scalene Triangle v1
  1. Acute
  2. Obtuse
  3. Right
 
2. 
What kind of triangle is shown?
Right Triangle v2
  1. Acute
  2. Obtuse
  3. Right
3. 
The angle measures of a triangle are [math]30deg, 60deg, 90deg[/math]. Which of the following best classifies the triangle?
  1. Acute
  2. Obtuse
  3. Right
 
4. 
The angle measures of a triangle are [math]85deg, 38deg, 57deg[/math]. What kind of triangle is it?
  1. Acute
  2. Obtuse
  3. Right
5. 
Based on side length, which of the following best classifies the triangle below?
Equilateral Triangle v2
  1. Scalene
  2. Isosceles
  3. Equilateral
 
6. 
Based on side length, which of the following best classifies the triangle below?
Scalene Triangle v3
  1. Scalene
  2. Isosceles
  3. Equilateral
7. 
The sides of a triangle measure 6 m, 7 m, and 4 m. Which type of triangle is described?
  1. Scalene
  2. Isosceles
  3. Equilateral
 
8. 
The sides of a triangle measure 3 cm, 2 cm, and 3 cm. Which type of triangle is described?
  1. Scalene
  2. Isosceles
  3. Equilateral
9. 
Elijah cuts out a triangle from a piece of cardboard as shown below. Which of the following best describes Elijah's triangle?
Obtuse Triangle v3
  1. Acute and scalene
  2. Obtuse and scalene
  3. Acute and isosceles
  4. Obtuse and isosceles
 
10. 
Giselle constructs the triangle below using a compass and straight edge. Two of the sides measure the same length and all of the angles measure less than [math]90deg[/math]. Which of the following best describes Giselle's triangle?
Isosceles Triangle v3
  1. acute and equilateral
  2. right and equilateral
  3. acute and isosceles
  4. right and isosceles

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