• Applying proportional reasoning
• Using dilations on the coordinate plane to determine measures of similar and congruent figures
• Finding the ratios of the perimeters and areas of similar triangles, trapezoids, and parallelograms

Lewis and Clark:
PBS lesson in which students use a map to estimate/calculate the time and distance of different segments of the expedition.

Learning about Length, Perimeter, Area, and Volume of Similar Objects Using Interactive Figures: Side Length and Area of Similar Figures
Students can learn about the length, perimeter, area, and volume of similar objects using dynamic figures. In this part, Side Length and Area of Similar Figures, the user can manipulate the side lengths of one of two similar rectangles and the scale factor to learn about how the side lengths, perimeters, and areas of the two rectangles are related.

Egg-scape Basket
Students construct an emergency escape system.

X-33 and Venture Star
Students will build a scale model and describe how models can be used in research. The models will also be used to calculate proportionality and ratios.

Safe Navigation
Students working individually will plot a course on graph paper using a compass rose and a ruler. They will then establish the course outdoors in TEAMS using a compass, compass rose, measuring tape, and transit.

Lost at Sea - The Search for Longitude: 
Students research and chart the shortest course to circumnavigate the globe.

Learning About, Length, Volume, Area, and Perimeter of Similar Figures:
Students develop a better understanding of area and perimeter with respect to scaling.

Bringing the Solar System Down to Earth:
Students will develop a scaled-down model of the solar system.

Interior Angles: 
Notes, drawings, and processes for teaching how to find the sum of the interior angles in any regular polygon.

Measure Angles:
Introduction to measuring angles. Begins with very basic, non-mathematical language.

EduRef
How Do Scientists Measure the Earth?

Ed Helper
Worksheets provided.  You only need to select appropriate topic and select create worksheet on the next page that follows.

Math
A four step lesson that gives a brief explanation, guided examples, and assessment.

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