Question

9 Questions with answers please (check my work.)

Answer 1

1. Which of the following is the best definition of a linear pair of angles?
A. A linear pair is a pair of angles whose measures sum to 180 degrees and share a common ray.
B. A linear pair is a pair of angles with a common vertex whose sum is 180.
C. A linear pair is a pair of angles with a common vertex and sides that are opposite rays.****
D. A linear pair is a pair of adjacent angles with no interior points in common.

Answer 2

2. What is the value of x?
A. 142
B. 132
C. 71
D. 66****

Answer 3

3. Find the value of x.
A. 6
B. 12
C. 4
D. 10****

Answer 4

4. Where is the centroid of any given triangle?
A. The point of concurrency of the altitudes of the triangle.
B. The point of concurrency of the medians of the triangle.****
C. The point of concurrency of the perpendicular bisector of the triangle.
D. The point of concurrency of the angle bisectors of the triangle.

Answer 5

5. Which of the following best describes the altitude of a triangle?
A. A segment perpendicular to a side of the triangle
B. A segment that passes through the midpoint and is perpendicular to a side of a triangle.
C. A segment drawn from the vertex to the midpoint of the opposite side.
D. A segment drawn from the vertex perpendicular to the line containing the opposite side.****

Answer 6

6. The vertices of a triangle are P(-8, 1), Q(-6, -8), and R(4, -3). Name the vertices of the image reflected across the x-axis.
A. P'(-8, 1), Q'(-6, -8), R'(4, -3)
B. P'(-8, -1), Q'(-6, 8), R'(4, 3)****
C. P'(8, 1), Q'(6, -8), R'(-4, -3)
D. P'(8, -1), Q'(6, 8), R'(-4, 3)

Answer 7

7. What is the measure of a counterclockwise rotation about the spinner center that maps label f to label h?
A. 108
B. 72****
C. 36
D. 288

Answer 8

8. The dashed-line triangle is a dilation image of the solid-lined triangle.

Is the dilation an enlargement or a reduction? What is the scale factor of the dilation?
A. reduction; 1/4****
B. reduction; 2
C. reduction; 1/2
D. enlargement; 2

Answer 9

9. Determine weather angle ABC--->and JGH is a reflection, translation, rotation, or glide reflection.

What are the reflection line, translation rule, center and angle or rotation, or glide translation rule and reflection line?
A. rotation; 180 degrees about (-0.5, 0)
B. glide reflection; translate 8 units to the right then reflect across the line y=4
C. reflection; x=5
D. rotation; 180 degrees about (1,4)****

Answer 10

My answers are:
1. C
2. D
3. D
4. B
5. D
6. B
7. B
8. A
9. D
Can someone please help check my work