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Welcome to math! Thursday, April 12

Welcome to math! Thursday, April 12. Objective of Investigation 2.3 Use geometric understanding of square roots to find lengths of the line segments on a dot grid. Area vs. Length of a s . What is the exact side length of the square? = √12 units

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Welcome to math! Thursday, April 12

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  1. Welcome to math!Thursday, April 12 Objective of Investigation 2.3 Use geometric understanding of square roots to find lengths of the line segments on a dot grid.

  2. Area vs. Lengthof a s • What is the exact side length of the square? = √12 units • What is the approximate side length of the square? ≈ 3.464101615 units 12 units2

  3. Area vs. Lengthof a s • What is the exact side length of the square? = √19 units • What is the approximate side length of the square? ≈ 4.358898935 units 19 units2

  4. Area vs. Lengthof a s • What is the exact side length of the square? = √50 units • What is the approximate side length of the square? ≈ 7.071067811 units 50 units2

  5. Area vs. Lengthof a s • What is the exact side length of the square? = 8 units • Why is there no approximate side length of this square? Because 8 ∙ 8 = 64 64 is considered a perfect square 64 units2

  6. Can you think of any otherperfect squares? 49 1 4 25 16 36 9

  7. Area vs. Lengthof a s • What is the area of this square? = 5.29 units2 • Why does area’s unit measure squared? Because you are multiplying 2 dimensions, length x height 2.3 units ? units2

  8. Practice Do page 25 35 - 38

  9. Longest Day • Venus rotates so slowly its day length is longer than its year. At 243 days it is equivalent to almost eight Earth months.

  10. Longest animal in the world • The longest animal is the bootlace worm, Lineuslongissimus; it reaches lengths of 60 metres (that’s just under 200 feet).

  11. Longest place name in the world • Llanfairpwllgwyngyll-gogerychwyrndrobwll-llantysiliogogogoch is a large village and community on the island of Anglesey in Wales.

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