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1

For each of the following, identify the hypotenuse.
(a) A (b) S

P R
B C

Q
(a) AC is the hypotenuse. The side opposite to the right angle.

(b) PR is the hypotenuse of triangle PSR.
PQ is the hypotenuse of triangle PRQ.
Self Practice 13.1a

1. For each of the following, identify the hypotenuse.
(a) B (b) b (c) R
C S
a c Q
T
A
P
What is the relationship between the sides
of a right-angled triangle? LEARNING
STANDARDS
2 Flip Determine the relationship
between the sides of a
Classroom
right-angled triangle. Hence,
Aim: To explore and explain the Pythagoras’ theorem. explain the Pythagoras’
Instruction: • Explore by yourself before the lesson theorem by referring to
begins and discuss in groups of four the relationship.
during the lesson.
• Open the folder downloaded from page vii.

1. Open the f ile Pythagoras.ggb using GeoGebra.
The screen displayed shows a right-angled triangle
ABC with a square drawn on each side of the
triangle.
2. Click and drag the coloured shapes in the square CHAPTER
on sides AB and BC, and move them into the
square on side AC. Do all the coloured shapes f ill 13
up the square on side AC perfectly?
3. Click and drag the slider ‘Move all’ or click at
the checkboxes ‘Show line guides’ and ‘Move one
by one’ for help.

295
The Pythagoras’ Theorem

13 TB Math F1.indd 295 11/10/16 12:22 PM