anthonyherd18
15.10.2020 •
Mathematics
Triangle CDA is the image of triangle ABC after a 180º rotation around the midpoint of segment AC. Triangle ECB is the image of triangle ABC after a 180º rotation around the midpoint of segment BC. Explain how to use what you know about the sum of the angles in a triangle to figure out the sum of the angles of quadrilateral ABEC .
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Ответ:
Step-by-step explanation:
we know that
If two triangles are congruent
then
their corresponding sides are congruent
In this problem we have that
Triangle RST is congruent with Triangle TXY
so
therefore