This is true. The sum of interior angles always add up to 180<span>°.
Hopefully this helps! If you have any more questions or don't understand, feel free to DM me, and I'll get back to you ASAP! :)
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Answer:

Step-by-step explanation:
Having the radius to be involved, the shape is a circle.
<u>Circumference formula </u>

Finding radius, formula will be reversed.


Answer:
a) 15
Step-by-step explanation:
x+8
substitute x value in
7+8
=15
3/5 i believe. if you take 7 and divide it by 2 its 3.5.