PI DAY Covering a flower pot We measured the circumference and height of a few pots of flowers in our school. We want to cover the lateral surface of the pot with a decorative paper. What surface should have the decorative paper for this action? We obtained the circumference of the great circle = We obtained the circumference of the little circle = Height of the pot is h=40 cm = ⟹ 6,28 ⋅ = 126 ⟹ ≃ 20,06 ≈ 20 ⟹ ⟹ ≈ = ⟹ 6,28 ⋅ = 63 ⟹ ≃ 10,03 ≈ 10 ⟹ ⟹ ≈ ⊥ ⟹ 2 =ℎ 2 + ( − ) 2 ⟹ ⟹ 2 = 1600 + 100 ⟹ ⟹ = , cm ⟹ = ( + ) ⟹ = , ⋅ , ( + ) =
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Transcript
PI DAY
Covering a flower pot
We measured the circumference and height of a few pots of flowers in our
school. We want to cover the lateral surface of the pot with a decorative
paper. What surface should have the decorative paper for this action?
We obtained the circumference of the great circle 𝑳𝟏 = 𝟏𝟐𝟔 𝒄𝒎
We obtained the circumference of the little circle 𝑳𝟐 = 𝟔𝟑 𝒄𝒎