B (11*11)
D (12*12)
E (15*15)
Answer:
<GOJ
Step-by-step explanation:
O is the center of the circle
So central angle is <GOJ
Answer:
5
Step-by-step explanation:
Answer:
A'(-1,-3)
B'(-2,-2)
C'(-4,-3)
Step-by-step explanation:
The rotation by 90° counterclockwise about the origin has the rule

So, the vertices of the triangle ABC have the images:

see attached diagram for details.