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 A skateboarder wants to build a launch ramp, using a sheet of plywood 140 cm long for the angled surface of the ramp. She reads that the angle between the

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A skateboarder wants to build a launch ramp, using a sheet of plywood 140 cm long for the angled surface of the ramp. She reads that the angle between the ground and the riding surface should be 25. How high will the ramp be from ground to its top edge?     

 Jan 12, 2016

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 #1
avatar+130511 
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We can use the sine for this......the ramp length is the hypotenuse of a right triangle and the opposite side from the angle of elevation is the ramp height, h

 

sin(25)  = h/ 140          .....multiply both sides by 140

 

140*sin(25)  = h  =  about 59.17 ft

 

 

 

cool cool cool

 Jan 12, 2016

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