Janet read 1
2
of a book in the morning, and she read some more at night. By the end of the day, she still had
2
5
of the book left to read. How much of the book did Janet read at night?

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .

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