# measuring tree 2 More Options: Make a Folding Card

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#### Storyboard Text

• We are now inside to measure the height of the trees using all of our measurements
• As this is only an example I will be using hypothetical measurements :)
• Let's say that my eye level height is 150cm, the angle of the top of the tree is 21°, and the distance between me and the tree is 154cm
• 150cm21°154cm
• 150cm
• To find the height of the whole tree we need to add the x value and our eye level height
• 21°
• 154cm
• h = 59.1 + 150 = 209.1cm
• Now you're done!
• x
• eye level height = 150cm
• Using a diagram will assist us in calculating the tree's height easier. 'h' signifies the tree's height which is currently unknown.
• distance = 154cm
• angle (clinometer reading) = 21°
• h
• The basic formula for finding height is 'distance * tan(angle'tan is used as there is no measurement on the hypotenuse, only the adjacent and opposite sides.
• 21°
• 154cm
• The working out for this example would be '154 * tan(21'x = 59.1cm'x' is the value of the triangle without the inclusion of the eye level height
• x
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