Each pair of interior angle and the exterior angle
So the exterior angle = 360° - the interior angle.
Answer:

Step-by-step explanation:
Given



Reflection across y-axis
Required
Find C'
For reflection across y-axis, the rule is:

So, the image of C is:


Hence:

Answer:
15ft
Step-by-step explanation:
Draw out the picture and use the Pythagorean theorem (equation is written in blue) to solve.
View Image