Question 740850
What they are trying to show is that you can add and subtract
angles just like ordinary numbers. Also you can replace the
numbers with letters.
given:
Angle a is {{{ x }}} degrees
Angle b is {{{ 20 }}} degrees larger than a
Angle b = {{{ x + 20 }}}
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Suppose {{{ x = 20 }}} degrees
Then, angle b = {{{ x + 20 = 20 + 20 }}}
{{{ 20 + 20 = 40 }}}
So, angle a = 20 degrees
Angle b = 40 degrees