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mermer11
25.07.2019 •
Mathematics
If an isosceles trapezoid has a base angle that measures 42 degrees what are the other three angle measures.
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Ответ:
we know that
∡A+∡B+∡C+∡D=360°
∡A=42°
If is an isosceles trapezoid
then
∡A=∡D
so
∡D=42°
and
∡B=∡C
then
2*42°+2*∡C=360°-------> ∡C=[360°-2*42°]/2-----> ∡C=138°
∡C=138°
∡B=138°
therefore
the answer is
the other three angle measures are
42°
138°
138°
Ответ: