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Unit 1 Area

Terminolgy and area examples

QuestionAnswer
Area A = L x H
If there is a number don't forget to add what? Units
42 cm and 33 cm = 42cm x 33cm = 1,386 cm^2
Method A: 42 cm=___m 42 x 1m / 100 cm = 0.42 m
Method B: 33 cm=___m 33 x 1m / 100cm = 0.33 m
0.33m and 0.42 m 0.33m x 0.42m = 0.1386 m^2
Method B: 1,386cm^2=___m^2 1,386 x (1m / 100cm)^2 = 0.1386m^2
What should you not forget to do during conversions that are squared? Do not forget to square what is in the parenthesis
10in and 10 in 10in x 10 in = 100 in^2
100^2in=___m^2 1in = 2.54 cm 100 x (2.54cm/ 1in)^2 = 645.16 cm^2, 645.16 x (1m / 100cm)^2= 0.064516 m^2 or 6.45 x10^-2 m^2
100^2in=___cm^2 1in = 2.54 cm 100 x (2.54cm / 1in)^2 =645.16 cm^2 or 6.45 x 10^2 cm^2
100in^2=___mm^2 1in = 2.54 cm 100 x (2.54cm / 1in)^2 = 645.16 cm^2, 645.16 x (10mm / 1cm)^2 = 64516 mm^2 or 6.45 x 10^4 mm^2
Another thing to not forget is? Sig figs
Created by: edith1234
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