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Form 2 Mathematics: Pythagoras theorem online video lessons

Form 2 Mathematics: Pythagoras theorem online video lessons

Lessons (16)

• 1.    Introduction: Deriving the Pythagoras theorem
  6m 14s

• 2.    Solutions of problems using Pythagoras theorem
  4m 38s

• 3.    Applications of Pythagoras Theorem
  5m 25s

• 4.    Revision exercise on Pythagoras Theorem
  6m 6s

• 5.    The figure below shows a triangle ABC which is right-angled at C. Find: (a) AB when AC = 5 cm and BC = 12 cm. (b) AC when AB = 20 cm and BC = 16 cm. (c) BC when AC = 10 cm and AB = 26 cm. (d) AB when AC = 5 m and BC = 6 m.
  3m 32s

• 6.    Calculate the length of the diagonal of a rectangle whose sides are 6 cm and 8 cm long.
  1m 4s

• 7.    Find the length of the diagonal of a square of side 4 cm.
  1m 8s

• 8.    Find the height of an isosceles triangle if the equal sides are each 26 cm and the base is 48 cm long.
  1m 22s

• 9.    Find the length of a side of a square whose diagonal is 6 cm.
  1m 33s

• 10.    (a) Determine the length of a side of a rhombus whose diagonals are 18 cm and 24 cm long. (b) The shorter diagonal of a rhombus of side 25 cm is 30 cm. Find the length of the other diagonal.
  3m 4s

• 11.    Find the height of an equilateral triangle of side 10 cm.
  1m 7s

• 12.    The figure below shows a trapezium ABCD in which side AB is perpendicular to both AD and BC. Side AD = 17 cm, DC = 10 cm and CB = 9 cm. Calculate the length AB.
  1m 26s

• 13.    An electric pole is supported to stand vertically by a tight wire as shown below. Find the height of the pole.
  1m 15s

• 14.    The figure below shows a triangle ABC which is right-angled at C. CB = 8 cm and AC = 6 cm. Find CD.
  0m 0s

• 15.    The figure below represents a cross section of a building. The building is 9 metres wide and 12 metres high. If the slant edge measures 8 metres, calculate the height from the floor to its roof.
  1m 29s

• 16.    A ship leaves port Q and moves straight due West to port R covering a distance of 320 km. Port R is 180 km to the North of port S. Find the shortest distance in km between port S and Q. (Give the answer to 4 s.f).
  2m 2s