1. acute triangle
A) all angles measure more than 90 degrees
B) has one obtuse angle
C) the sum of all the angles is less than 90 degrees
D) all angles measure less than 90 degrees

2. acute angle
A) less than 90 degrees
B) more than 90 degrees
C) exactly 90 degrees
D) exactly 180 degrees

3. obtuse angle
A) measures more than 90 degrees, but less than 180 degrees
B) measures less than 90 degrees
C) measures exactly 90 degrees
D) measures 180 degrees

4. obtuse triangle
A) has two obtuse angles
B) the sum of all three angles equals 105 degrees
C) has no obtuse angles
D) has one obtuse angle

5. right angle
A) measures exactly 90 degrees
B) measures less than 90 degrees
C) measures more than 90 degrees
D) measures 180 degrees

6. right triangle
A) the sum of all three angles equals 90 degrees
B) has two right angles
C) has no right angles
D) has one right angle

7. straight angle
A) the sum of the length of the angles equals 180 degrees
B) measures more than 180 degrees
C) measures less than 180 degrees
D) exactly 180 degrees

8. equilateral triangle
A) all sides are the same length
B) no sides are the same length
C) has 4 sides
D) only 2 sides are the same length

9. isosceles triangle
A) has 5 sides
B) no sides are the same length
C) two or more sides are the same length
D) a new sauce for your chicken nuggets

10. scalene triangle
A) two or more sides are the same length
B) no sides are the same length
C) exactly two sides are the same length
D) all sides are the same length

11. triangle
A) polygon with three sides
B) polygon with four sides
C) polygon with five sides
D) polygon with six sides

12. angle
A) always exactly 90 degrees
B) a polygon
C) something that has wings
D) two rays having a common endpoint