Please help me with this I simply don't get it I've been on it for hours

Mathematics

1 answer:

MaRussiya [10]3 years ago

7 0

Start off with the fact that angle1 = angle3. Add the quantity "angle2" to both sides like so

angle1+angle2 = angle3+angle2

Then replace the "angle2" on the right side with "angle4". This substitution or replacement is possible because we're given angle2 = angle4.

So we go from this
angle1+angle2 = angle3+angle2
to this
angle1+angle2 = angle3+angle4

At this point, we use the angle addition postulate to go from
angle1+angle2 = angle3+angle4
to
angle ABC = angle XYZ

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