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• Lines and angles . • • • • • • Naming angles •• .•
~:('Iol:«1'_ REMEMBER
PAGE 4 Lines which are always the same distance apart REMEMBER
and never meet are parallel. Sharp ongles smaller than
L Blunt angles larger than
a right angle are called acute angles.
Lines which are at right angles to each other
are perpendicular. a right angle are called obtuse angles.
Decide whether the red lines on these objects Use your right-angle measure to check whether the marked
are parallel or perpendicular. angles are acute, obtuse or right angles.
Write the answers in your book.

[E] Decide what sort of angles these are.

Choose materials to draw and colour a pattern
which has parallel and perpendicular lines.

rn rn

0, e, h, j perpendicular; b, C, d, f, g, i parallel. 0, C, e, f, 9 are acute; Possible shapes:
b is a right angle;
d, h are obtuse.

Practical: choosing materials to draw and colour
a pattern with parallel and perpendicular lines.
° right angle C
b obtuse
C obtuse
d acute