I believe the answer is a diagonal
Angle a +angle b = 180 degrees
angle a + angle a + 30 = 180
2*angle a = 150
angle a = 75degrees
angle b = 75+30 = 105 degrees
now, angle b +angle c = 180
so, angle c = 180-105 = 75 degrees
Answer:
the radius is 7
Step-by-step explanation:
the full lenght is the circumference and a raduis is half of that, therefore 7
A) prevent the bone wearing each other out where they touch
