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## Mrs. Whalen ’ s Kindergarten Math Lesson #56: Review Geometry

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**Mrs. Whalen’s**Kindergarten Math Lesson #56: Review Geometry**All of these shapes are flat shapes. They can not stand**up. If I cut them out they could not stand up because they are not solid shapes. rectangle square triangle hexagon circle**Let’s watch!**https://www.youtube.com/watch?v=htcuPenTg38**I see a triangle in front of a hexagon. A hexagon has 5**sides and 5 corners. A triangle has 3 sides and 3 corners.**A square has 4 sides and 4 corners.**side corner**These two triangles are the same. They have the same number**of sides and same number of corners.**These two shapes are different. A circle has no corners and**a rectangle has 4 corners. corner**Some shapes are solid. The shapes can stack on top of each**other, slide around or roll. They are 3-dimensional shapes or 3-D shapes.**Let’s watch!**https://www.youtube.com/watch?v=K9L9l86N-xM**Both of these shapes are closed figures. A closed figure is**where all of the sides connect.**The triangle and square are closed. The sides that make up**these shapes meet to form a corner. corner corner**This is a closed circle.**This is an open circle.**Both the cube and the square are made up of straight lines**and are closed figures.**How many small triangles will it take to make on large**triangle?**Let’s move triangles over to see how many small triangles**make a large triangle.**Let’s move triangles over to see how many small triangles**make a large triangle. 1 2 3**Let’s move triangles over to see how many small triangles**make a large triangle. 1 4 5 2 6 3**For the last 3 spaces we have to turn the triangles upside**down. 1 4 5 2 6 3**For the last 3 spaces we have to turn the triangles upside**down. 1 • 7 4 5 7 2 8 6 9 3**It took 9 small triangles to fill up the large triangle.**1 • 7 4 5 7 2 8 6 9 3**Let’s make a house together. You help me. You draw a**house using shapes on your paper with me. First let’s start with a square.**Next draw a rectangle in the middle of the bottom of the**square. This will be the door.**Now draw two circles. They will be bushes in the front of**the house.**Now draw two squares. They will be windows on the front of**the house.**Now draw a small rectangle. That will be the chimney on top**of the house.**Goodbye!**See you next time!