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EXAMPLE: 3. A wall that is 1.4m long has started to lean and now makes an angle of 80 degrees with the ground. A 2m board is jammed between the top of the wall and the ground to prop up the wall. a) What angle does the board make with the ground? b) What angle does the board make with the wall? c) How far is the board from the base of the wall? ACE

Sagot :