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271. Essential Understanding of Geometry for English Language Learners NCTM 2016 Annual Meeting & Exposition at San Francisco, CA
G3. Decomposing and Rearranging a Triangle into a Rectangle I. Strategy: Halving the Height of the Triangle. Slide 45. Decomposing and Rearranging an Acute Triangle into a Rectangle. Slide 48. Rotation to create the left edge of the rectangle. Decomposing and Rearranging an Obtuse Triangle into a Rectangle Slide 54. The longest side is the base of the height.
G4. Decomposing and Rearranging a Triangle into a Rectangle II. Strategy: Halving the Base of the Triangle.
G5. Decomposing and Rearranging a Triangle into a Variety of Shapes. Slide 124. Comparing a Triangle with a Heptagon. Slide 131. Halving the Rectangle.
G6. Decomposing and Rearranging a Triangle into Rectangles. Slide 160. Halving-the-height Approach. Slide 161. Halving-the-base Approach. Slide 163. 4. Can you relate the algebraic formulas to the figures? A = b·[(1/2)·h] Slide 164. 4. Can you relate the algebraic formulas to the figures? A = [(1/2)·b]·h
G7. Comparing Triangles and Parallelograms.
G8. Two Statements of the Pythagorean Theorem. Slide 198. The square on the hypotenuse. |
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