Question

Please solve question 5

Answer 1

Answer:

Step-by-step explanation:

1.

let all the angles be 2x , 3x and 4x

so , 2x + 3x +4x = 180°    [ triangle sum property ]

                     9x = 180° ÷9

                       x = 20°

now , A = 20×2 = 40°

         B = 20×3 = 60°

         C = 20×4 = 80°

2.

let height of ladder = 13 m

base                          =  5 m

let height of building = x

by pythagorus theorm

5² + x² = 13²

  25 + x² = 169

          x² = 169-25 = 144

          x = √144

          x = 12 m

so height of building is 12 m

3.

distance travelled in north = 4 km

distance travelled in east = 3 km

let the distance between starting and terminating point be x

by pythagorus theorm

4² + 3²  = x²

   16 + 9  = x²

        √25   = x

          5 km = x

so the distance between the starting and terminating point is 5 km

hope it helps you very well