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Fifth Grade (Grade 5) Triangles Questions

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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
Grade 5 Triangles CCSS: 5.G.B.4
Is the triangle shown a regular or irregular polygon?
Right Triangle v2
  1. regular polygon
  2. irregular polygon
Grade 5 Triangles CCSS: 5.G.B.4
A(n)                 triangle has no sides the same length.
  1. scalene
  2. equilateral
  3. isosceles
Grade 5 Triangles CCSS: 5.G.B.4
An isosceles triangle has at least two congruent sides.
  1. True
  2. False
Grade 5 Triangles CCSS: 5.G.B.4
All isosceles triangles are right triangles.
  1. True
  2. False
Grade 5 Triangles CCSS: 5.G.B.4
An acute triangle is a triangle having three acute angles.
  1. True
  2. False
Grade 5 Triangles CCSS: 5.G.B.4
All acute triangles are equilateral triangles.
  1. True
  2. False
Grade 5 Triangles
An equilateral triangle has three congruent sides.
  1. True
  2. False
Grade 5 Triangles CCSS: 5.G.B.4
A(n)                 triangle has three sides of the same length.
  1. isosceles
  2. scalene
  3. equilateral
Grade 5 Triangles CCSS: 5.G.B.4
The following is an example of a scalene triangle.
Acute Triangle v3
  1. True
  2. False
Grade 5 Triangles CCSS: 5.G.B.4
Which of the following best describes the triangle?
Right Triangle v2
  1. right and scalene
  2. acute and scalene
  3. right and equilateral
  4. acute and equilateral
Grade 5 Triangles
How many diagonals can be drawn in a triangle?
  1. 0
  2. 1
  3. 2
  4. 3
Grade 5 Triangles CCSS: 5.G.B.4
Which of the following best describes the triangle?
Scalene Triangle v1
  1. scalene and acute
  2. scalene and obtuse
  3. equilateral and acute
  4. equilateral and obtuse
Grade 5 Triangles CCSS: 5.G.B.4
A scalene triangle is a triangle having three sides of different lengths.
  1. True
  2. False
Grade 5 Triangles CCSS: 5.G.B.4
If each side of the triangle is the same length, then it is an equilateral triangle.
Equilateral Triangle ABC v2
  1. True
  2. False
Grade 5 Triangles CCSS: 5.G.B.4
What is this triangle called? Why?
Obtuse Triangle ABC v3
Grade 5 Triangles CCSS: 5.G.B.4
What kind of triangle is this? Why?
Acute Triangle ABC v3
Grade 5 Triangles CCSS: 5.G.B.4
What kind of triangle is this? Why?
Obtuse Triangle v2
Grade 5 Triangles CCSS: 5.G.B.4
Classify the triangle by its sides and then by its angles:




sides:                   


angles:                   
Equilateral Triangle ABC v1
Grade 5 Triangles
What are the 3 types of triangles, by side length?
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