# Henry Project

More Options: Make a Folding Card

#### Storyboard Description

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#### Storyboard Text

• Peep wants to build a ramp, and he wants to get some good hang time.He knows that the two legs are 4 feet, he wants to find out what the angle of elevation is.So, he uses tan-1(4/4 and he gets 45° ﻿
• ﻿
• ﻿
• ﻿
• x
• 4 ft﻿
• ﻿x=45° ﻿
• 4 ft﻿
• This will be too steep...﻿
• Now Peep﻿ builds a less steep ramp, and its measure is 30° ﻿and 2ft he wants to know how long his board will go when on the ramp, so he uses cos(30°=2ft/x. He divides 2 by cos(30°, and he gets 2.3 ft.
• ﻿That is too short!
• 30° ﻿
• x﻿
• 2ft﻿
• Peep has one last chance to see﻿ if his ramp will work. He makes the angle of elevation 30° ﻿ and he makes the top four feet. He wants to make sure that the bottom of the ramp is at least 2 feet.
• 30° ﻿
• 4ft﻿
• x﻿
• It works! Peep used sin(30°= x/4ft which he then multiplied sin(30 by 4 and got 2 feet!
• ﻿Yes! Finally!
• ﻿30° ﻿
• 4ft﻿
• x﻿
• ﻿Let's get it!
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