Simplified expression of 7z + 8 + 5z – 5z – 9?
1 answer:
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check the picture below.
the line QS is just a flat-line and therefore it has 180° on either side, so the angle QPR is 57°, as you see there, and since we know the diameter is 20, that simply means the radius of the circle is 10.
I use a calculator and made sure it was in degrees
