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Geometry Definitions
Contributed by: Heath
  • 1. acute triangle
A) has one obtuse angle
B) all angles measure more than 90 degrees
C) the sum of all the angles is less than 90 degrees
D) all angles measure less than 90 degrees
  • 2. acute angle
A) exactly 90 degrees
B) less than 90 degrees
C) exactly 180 degrees
D) more than 90 degrees
  • 3. obtuse angle
A) measures 180 degrees
B) measures less than 90 degrees
C) measures exactly 90 degrees
D) measures more than 90 degrees, but less than 180 degrees
  • 4. obtuse triangle
A) has two obtuse angles
B) the sum of all three angles equals 105 degrees
C) has one obtuse angle
D) has no obtuse angles
  • 5. right angle
A) measures exactly 90 degrees
B) measures 180 degrees
C) measures less than 90 degrees
D) measures more than 90 degrees
  • 6. right triangle
A) has one right angle
B) has no right angles
C) has two right angles
D) the sum of all three angles equals 90 degrees
  • 7. straight angle
A) the sum of the length of the angles equals 180 degrees
B) measures less than 180 degrees
C) measures more than 180 degrees
D) exactly 180 degrees
  • 8. equilateral triangle
A) only 2 sides are the same length
B) no sides are the same length
C) has 4 sides
D) all sides are the same length
  • 9. isosceles triangle
A) two or more sides are the same length
B) no sides are the same length
C) has 5 sides
D) a new sauce for your chicken nuggets
  • 10. scalene triangle
A) all sides are the same length
B) no sides are the same length
C) two or more sides are the same length
D) exactly two sides are the same length
  • 11. triangle
A) polygon with six sides
B) polygon with five sides
C) polygon with three sides
D) polygon with four sides
  • 12. angle
A) always exactly 90 degrees
B) something that has wings
C) a polygon
D) two rays having a common endpoint
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