5
2D shapes
5.1 Quadrilaterals diagonal
Worked example 1
parallel
I am a quadrilateral. All my sides are equal in length. None of my angles are 90°. I have two pairs of equal angles. What shape am I? Square or rhombus … Cannot be square …
trapezia
All sides are equal in length. Two pairs of equal angles.
M
Exercise 5.1
Name each of these special quadrilaterals. All the names are in the box.
SA
1
justify
No angles are 90°.
Must be a rhombus.
Focus
decompose
PL E
bisect
a
b
c
d
e
f
kite
rhombus
parallelogram rectangle
square trapezium
isosceles trapezium
g
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