Transcription of Classifying Triangles (by Angles) TRI 1 - Math Antics
1 Name: Date: Classifying Triangles (by Angles) TRI 1. Instructions: For each triangle, mark the box that matches its type when Classifying by angles. 1 2. Acute Acute Right Right Obtuse Obtuse 3 4. Acute Acute Right Right Obtuse Obtuse 5 6. Acute Acute Right Right Obtuse Obtuse 7 8. Acute Acute Right Right Obtuse Obtuse Triangles 2013 Math Plus Motion, LLC. Name: Date: Classifying Triangles (by Sides) TRI 2. Instructions: For each triangle, mark the box that matches its type when Classifying by sides. The marks on the sides of the Triangles show when two sides are congruent or the same length. 1 2. Equilateral Equilateral Isosceles Isosceles Scalene Scalene 3 4. Equilateral Equilateral Isosceles Isosceles Scalene Scalene 5 6. Equilateral Equilateral Isosceles Isosceles Scalene Scalene 7 8. Equilateral Equilateral Isosceles Isosceles Scalene Scalene Triangles 2013 Math Plus Motion, LLC.
2 Name: Date: Classifying Triangles (by both Angle and Sides) TRI 3. Instructions: For each triangle, mark the box from each catagory that matches its type. The marks on the sides of the Triangles show when two sides are congruent or the same length. 1 2. Acute Equilateral Acute Equilateral Right Isosceles Right Isosceles Obtuse Scalene Obtuse Scalene 3 4. Acute Equilateral Acute Equilateral Right Isosceles Right Isosceles Obtuse Scalene Obtuse Scalene 5 6. Acute Equilateral Acute Equilateral Right Isosceles Right Isosceles Obtuse Scalene Obtuse Scalene 7 8. Acute Equilateral Acute Equilateral Right Isosceles Right Isosceles Obtuse Scalene Obtuse Scalene Triangles 2013 Math Plus Motion, LLC. Name: Date: Finding an Unknown Angle TRI 4. Instructions: For each triangle, find the unknown angle (X). Remember that for each triangle, the three interior angles must add up to 180 degrees.
3 1 2. X 80 . 40 . 70 45 X. m X = 65 m X =. 7. 70 1 80. 1. + 45 1 15. 115 65. 3 4. 60 X 20 . 90 X 50 . m X = m X =. 5 6. X X. 36 75 . 72 15 . m X = m X =. Triangles 2013 Math Plus Motion, LLC. Name: Date: Finding an Unknown Angle - Set 2 TRI 5. Instructions: For each triangle, find the unknown angle (X). Remember that for each triangle, the three interior angles must add up to 180 degrees. 1 2 56 . 86 . 54 X 56 X. m X = m X =. 3 4. 57 . 138 23 . X 25 X. m X =. m X =. X An equilateral triangle always has three 5 6. equal angles. What is their measure? X. 40 . m X =. X X. m X =. Triangles 2013 Math Plus Motion, LLC.
