# Form 2 Mathematics: Pythagoras theorem online video lessons

Form 2 Mathematics: Pythagoras theorem online video lessons

Lessons (**16**) * SHARE*

- 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

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