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Cut out a square, and fold it in half into a triangle. They glued this into their journals, and solved for the area of the triangle and the rectangle (square).

from rundesroom.com

Math Journal Sundays ... Kicked Up A Notch

Math Journals

dandelions and dragonflies: Interactively Math! I'm not usually a fan of interactive notebooks, but I do like this organization.

from rundesroom.com

Math Journal Sundays

Math Journal Sundays - area of a triangle vs. area of a rectangle

from rundesroom.com

Math Journal Sundays - Comparing Perimeter and Area

Runde's Room: Math Journal Sundays - Comparing Perimeter and Area - Three Part Math Lesson and Journal Entry