Hang Out Inside My Piano!

Hang Out Inside My Piano!

September 17, 2019

What shape is your house? Maybe a rectangle with some triangle roof shapes?  How cool would it be if it looked like a piano, with a huge violin leaning on it? This cool building was made at the Urban Planning Exhibition Hall in Huainan City, China. The piano has windows all the way around in that stripe, and the violin part holds the stairs that take you inside the piano. You can see how huge a house this is — just look at the tiny people standing at the bottom!

Wee ones: What shapes are the windows going around the piano?

Little kids: The violin has 4 long bars that look like violin strings. If you pluck the first and last to play them, how many strings are left in between?  Bonus: If the 4 violin strings are spaced 2 feet apart, how far is the 4th string from the 1st? Think carefully!

Big kids: Imagine a house shaped like your favorite toy. If it’s 50 feet tall, how much taller than you is it in feet? Or try feet and inches!  Bonus: If that person is 6 feet tall, about how high off the ground is the top of the piano lid? Eyeball it and take a guess!

The sky’s the limit: If the violin part of the building is 60 times as tall as a real violin and 700 inches taller than 10 violins stacked end to end, how tall are a real violin and this violin building?











Wee ones: Rectangles.

Little kids: 2 strings.  Bonus: 6 feet, since the 4 strings have only 3 gaps between them.

Big kids: Different for everyone…subtract your height in feet from 50, or take away feet and inches to be more exact!  Bonus: We’re thinking about 48 feet. The piano legs are about twice the person’s height, then the piano is about 3 people’s height, and the lid adds about 3 people’s height.That comes to 8 times the person’s height.

The sky’s the limit: 14 inches for a violin, 70 feet (840 inches) for the building. If 700 is the difference between 10 violins and the building, which is 60 violins tall, then that 700 equals the height of 50 violins. Dividing, we get 14 inches for a violin, and 60 times that (840 inches) for the building.

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About the Author

Laura Overdeck

Laura Overdeck

Laura Bilodeau Overdeck is founder and president of Bedtime Math Foundation. Her goal is to make math as playful for kids as it was for her when she was a child. Her mom had Laura baking before she could walk, and her dad had her using power tools at a very unsafe age, measuring lengths, widths and angles in the process. Armed with this early love of numbers, Laura went on to get a BA in astrophysics from Princeton University, and an MBA from the Wharton School of Business; she continues to star-gaze today. Laura’s other interests include her three lively children, chocolate, extreme vehicles, and Lego Mindstorms.

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