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Fifth Grade (Grade 5) Triangles Questions

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Grade 5 Triangles CCSS: 5.G.B.4
Name the triangle.
Isosceles Triangle v1
  1. equilateral triangle
  2. isosceles triangle
  3. scalene triangle
Grade 5 Triangles CCSS: 5.G.B.4
An isosceles triangle has three congruent sides.
  1. True
  2. False
Grade 5 Triangles
According to side lengths, this is what kind of triangle?
Scalene Triangle v1
  1. scalene triangle
  2. isosceles triangle
  3. equilateral triangle
Grade 5 Triangles CCSS: 5.G.B.4
A(n)                 triangle has exactly two sides the same length.
  1. equilateral
  2. scalene
  3. isosceles
Grade 5 Triangles CCSS: 5.G.B.4
According to angle measure, this is what kind of triangle?
Right Triangle v3
  1. acute triangle
  2. obtuse triangle
  3. right triangle
Grade 5 Triangles CCSS: 5.G.B.4
According to side lengths, what kind of triangle is ABC?
Equilateral Triangle ABC v2
  1. scalene triangle
  2. equilateral triangle
  3. isosceles triangle
Grade 5 Triangles CCSS: 5.G.B.4
Classify this triangle.
Obtuse Triangle v2
  1. scalene, obtuse
  2. scalene, acute
  3. isosceles, right
  4. isosceles, obtuse
Grade 5 Triangles CCSS: 5.G.B.4
Based on side length, which of the following best classifies the triangle?
Equilateral Triangle v2
  1. Scalene
  2. Isosceles
  3. Equilateral
Grade 5 Triangles CCSS: 5.G.B.4
A(n)                      is a triangle that has 3 equal sides.
  1. right triangle
  2. equilateral triangle
  3. scalene triangle
  4. isosceles triangle
Grade 5 Triangles CCSS: 5.G.B.4
Based on side length, which of the following best classifies the triangle?
Scalene Triangle v3
  1. Scalene
  2. Isosceles
  3. Equilateral
Grade 5 Triangles CCSS: 5.G.B.4
An                         equilateral triangle                         has three congruent sides.
Grade 5 Triangles CCSS: 5.G.B.4
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
Grade 5 Triangles CCSS: 5.G.B.4
Elijah cuts out a triangle from a piece of cardboard as shown. 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
Grade 5 Triangles CCSS: 5.G.B.4
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
Grade 5 Triangles CCSS: 5.G.B.4
Is the triangle shown a regular or irregular polygon?
Equilateral Triangle v1
  1. regular polygon
  2. irregular polygon
Grade 5 Triangles CCSS: 5.G.B.4
What kind of triangle is shown?
Scalene Triangle v1
  1. Acute
  2. Obtuse
  3. Right
Grade 5 Triangles CCSS: 5.G.B.4
A triangle with no congruent sides is a scalene triangle.
  1. True
  2. False
Grade 5 Triangles CCSS: 5.G.B.4
A scalene triangle is a triangle having one obtuse angle.
  1. True
  2. False
Grade 5 Triangles CCSS: 5.G.B.4
Giselle constructs the triangle shown using a compass and straight edge. Two of the sides measure the same length and all of the angles measure less than 90°. 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
Grade 5 Triangles
A triangle has two 45 degree interior angles. Which term correctly describes the triangle?
  1. regular
  2. scalene
  3. equilateral
  4. isosceles
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