Point D(-3,5) is a vertex of triangle DEF. After rotation of the triangle about the origin D us located at (3,5). Which of the following was the rotation of the triangle?
A. 90* (degrees) clockwise
B. 90* Counterclockwise
C. 180*
D. 360*
4 answers
180
Make a sketch and notice the nice symmetry.
I constructed a right-angled triangle, and using basic trig then angle of rotation
= 2(tan^-1 (3/5)
= 2(30.96..
= appr 61.9° clockwise
I constructed a right-angled triangle, and using basic trig then angle of rotation
= 2(tan^-1 (3/5)
= 2(30.96..
= appr 61.9° clockwise
The answer is 180 degrees I just took the test I pass it 100% you can trust me 100%
1 A C D
2 A
3 C
4 B
5 C
I got a 100%
2 A
3 C
4 B
5 C
I got a 100%
4 answers