Answer:
Step-by-step explanation:
they are asking, what multiple of 18 would equal 720
so divide 720 / 18 = 40
so the drawing on the building will be 1/40 th scale
that is, it will be one fortieth, of the real one. :)
angle 2 = 90° {corresponding angles}
angle 7 + angle 5 = 180° {linear pair}
or, angle 7 + 100° = 180° {angle 5 is corresponding to 100°}
so, angle 7 = 80°
same.
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