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Mastering Geometry Tools: Indirect Measurement and Constructions in Ohio Standards

This lesson focuses on essential geometry tools and techniques as outlined in the Ohio Content Standards. Students will learn to apply indirect measurement methods to calculate perimeter, circumference, and area of various shapes, including circles, triangles, and quadrilaterals. The lesson further emphasizes using tools like straightedges and compasses for drawing and constructing two- and three-dimensional figures. Additionally, students will explore the concepts of congruence and similarity, culminating in a practical assignment involving geometric constructions with a compass and straightedge.

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Mastering Geometry Tools: Indirect Measurement and Constructions in Ohio Standards

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  1. Lesson 1-5 Tools of the Trade

  2. Ohio Content Standards: • Apply indirect measurement techniques, tools and formulas, as appropriate, to find perimeter, circumference and area of circles, triangles, quadrilaterals and composite shapes, and to find volume of prisms, cylinders, and pyramids. • Draw and construct representations of two- and three-dimensional geometric objects using a variety of tools, such as straightedge, compass and technology. • Construct congruent or similar figures using tools, such as compass, straightedge, and protractor or dynamic geometry software.

  3. Vocabulary:

  4. Vocabulary: • Straightedge:

  5. Vocabulary: • Straightedge: an object used to draw a straight line

  6. Vocabulary: • Compass:

  7. Vocabulary: • Compass: a tool used to draw arcs and circles

  8. Vocabulary: • Constructions:

  9. Vocabulary: • Constructions: when figures are drawn using only a compass and a straightedge

  10. Vocabulary: • Midpoint:

  11. Vocabulary: • Midpoint: a point in the middle of a segment

  12. Use a straightedge to determine which of the three segments at the upper left forms a straight line with the segment at the lower right.

  13. Use a straightedge to determine which of the three segments at the upper left forms a straight line with the segment at the lower right.

  14. A B l Draw a figure similar to the one shown below. Mark a point C on line l that you judge will create BC that is the same length as AB. Then measure to determine how accurate your guess was.

  15. Use a compass and straightedge to construct a six-sided figure.

  16. Assignment:Pgs. 33 - 34 7-11 all, 15-19 all

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