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Lesson Materials

Lesson 3-2 Estimate Measures
How many triangles are in the figure below?

READ the instructions on the right and INTERACT with the GeoGebra applet below.


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Objective

6.10 The student will estimate and then determine length, weight/mass, area, and liquid volume/capacity, using standard and nonstandard units of measure.

 Directions Close 

Use the slides to help you determine the number of triangles in the figure.

 Directions 2 Close 

Describe the process you used to estimate the number of triangles. Justify your answer.


 Hands-On Activities Close 
Measurement Scavenger Hunt
 Other Web Sites Close 
CIMT
Centre for Innovation in Mathematics Teaching
 Puzzles & Problems tangram Close 
From Math Forum:Two trains 150 miles apart are traveling toward each other along the same track. The first train goes 60 miles per hour; the second train rushes along at 90 miles per hour. A fly is hovering just above the nose of the first train. It buzzes from the first train to the second train, turns around immediately, flies back to the first train, and turns around again. It goes on flying back and forth between the two trains until they collide. If the fly's speed is 120 miles per hour, how far will it travel?