1.A rotation by 2520° is how many full rotations?
A. 14
B. 10
C. 7
D. 5
2. Which of these rotations will map an equilateral triangle to itself?
A. 120°
B. 90°
C. 60°
D. 45°
3. How many lines of symmetry does a nonsquare rhombus have?
A. infinitely many
B. 0
C. 4
D. 2
4. Which line is a line of symmetry for the triangle?
1. A
2. D
3.C
4.B
5. How many different positive rotations of less than 360° will map a square to itself?
A. infinitely many
B. 1
C. 0
D. 3
1 answer
B. 1 (a rotation of 90°, 180°, or 270° will map the square to itself)