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Triangles Questions - All Grades

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Grade 10 Triangles
What is the definition of complimentary angles?
  1. Two angles that add to be 180°
  2. Two angles that have a difference of 90°
  3. Two angles add to be 90°
  4. Two angles that have a difference of 180°
Grade 5 Triangles CCSS: 5.G.B.4
What kind of triangle is shown?
Scalene Triangle v3
  1. right
  2. equilateral
  3. isosceles
  4. scalene
Grade 5 Triangles CCSS: 5.G.B.4
Name the triangle.
Scalene Triangle v2
  1. equilateral triangle
  2. isosceles triangle
  3. scalene triangle
Grade 5 Triangles CCSS: 5.G.B.4
According to angle measure, what kind of triangle is this?
Obtuse Triangle ABC v2
  1. right triangle
  2. obtuse triangle
  3. acute triangle
Grade 5 Triangles CCSS: 5.G.B.4
What kind of triangle is shown?
Equilateral Triangle v1
  1. isosceles
  2. scalene
  3. equilateral
  4. obtuse
Grade 9 Triangles
m∠A = 23, m∠B = 57. Find m∠C.
Obtuse Triangle ABC v3
  1. 90
  2. 100
  3. 110
  4. 120
Grade 5 Triangles CCSS: 5.G.B.4
An equilateral triangle MUST have
  1. all sides that are the same length.
  2. no sides that are the same length.
  3. at least two sides that are the same length.
  4. no angles that are the same size.
Grade 8 Triangles
In triangle ABC, angle A measures 84 degrees and angle C measures 48 degrees. What is the measurement of Angle B?
Acute Triangle ABC v2
  1. 48 degrees
  2. 180 degrees - 84 degrees
  3. 84 degrees
  4. 180 degrees - 48 degrees
Grade 5 Triangles CCSS: 5.G.B.4
This is an example of a(n)                 triangle.
Equilateral Triangle v1
  1. right
  2. scalene
  3. equilateral
  4. isosceles
Grade 5 Triangles CCSS: 5.G.B.4
The triangle can best be described as
Right Triangle ABC v1
  1. an acute triangle.
  2. a right triangle.
  3. an obtuse triangle.
Grade 5 Triangles CCSS: 5.G.B.4
Name the triangle.
Isosceles Triangle v1
  1. equilateral triangle
  2. isosceles triangle
  3. scalene triangle
Grade 9 Triangles
Side AB = 30 cm, Side BC = 30 cm, Side AC = 20 cm. What kind of a triangle is this?
Isosceles Triangle ABC v1
  1. isosceles
  2. right triangle
  3. scalene
  4. equilateral
Grade 4 Triangles CCSS: 4.G.A.2
What type of triangle has 3 equal sides and 3 equal angles that measure 60°.
  1. equilateral triangle
  2. scalene triangle
  3. isosceles triangle
  4. right triangle
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