9. ABCD is a parallelogram in which one angle is 120 Find the other threeangles
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adjacent angles of a parallelogram sum to 180º
either adjacent angle to the 120º angle is 60º
opposite angles of a parallelogram are congruent
the other angles are 60º, 120º, and 60º (along with the 120º angle that was given)
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Answer:
given:in a parallelogram ABCD
Explanation:
if we think |A is 120
the other three angles are equal to
|B is 90,|C is 90,|D is 90
how means,
the sum of the angles in a parallelogram is 360degree right,
so, the other three each angles are equal to 90degree.
|ABC+|BCD=360
120+|BCD=360
|BCD=360-120
=240
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