Page 45 - 04MATY4 318 STEwsh DRM_Neat

46
• Quadrilateral angles paper quadrilaterals,
scissors
~:I'I'lS1'_ Zena named the four angles of this b
PAGE 82 quadrilateral a, b, c and d.
The she tore it into four pieces
around its corners.
d

She found that the angles fitted together
in a full turn without gaps or overlaps.
She glued them down to show her teacher.

W Experiment with different quadrilaterals
to find out if what Zena thinks is true.

~ Afterwards, write down what you discover.
nm

rn rn

Practical: experimenting with different a IN MIDDLE OUT b IN OUT a IN OUT
quadrilaterals to confirm that the
5 13 20 5 20 35 16
four interior angles add up to 360 0 • q
37 45 52 37 52 28
16 24 31 16 31 74 55
28 36 43 28 43 20 1
44 52 5q 44 5q 47 28
Write down result of experiments.
b Open: designing a 2-operation
subtraction machine with the
same effect as -1 q, e.g. -10, -q.
c Design as 'IN MIDDLE OUT'
table for subtractions used in b.