Class VII

The triangle whose lengths of sides are 7 cm, 24 cm, 25 cm is a __________.
  1. Acute-angled triangle
  2. None of these
  3. Obtuse-angled triangle
  4. Right-angled triangle
The triangle whose lengths of sides are 8 cm, 15 cm, 17 cm is a __________.
  1. Acute-angled triangle
  2. None of these
  3. Right-angled triangle
  4. Obtuse-angled triangle
 A tree is broken at a height of 5 m from the ground and its top touches the ground at a distance of 12 m from the base of the tree. Find the original height of the tree.
  1. 15 m
  2. 18 m
  3. 20 m
  4. 13 m
The hypotenuse of a right triangle is 10 cm long. If one of the remaining two sides is 8 cm in length, then the length of the other side is
  1. 8 cm
  2. 6 cm
  3. None of these
  4. 4 cm
A 15 m long ladder reached a window 12 m high from the ground on placing it against a wall at a distance a. Find the distance of the foot of the ladder from the wall.
  1. None of these
  2. 12 m
  3. 9 m
  4. 10 m
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