b)
c)
d)
e)
f)An angle of 91°
g)An angle of 180°
h)An angle of 210°
2.Assess whether the following statements are true or false. If the statement is false, explain why:
a)A trapezium is a quadrilateral with two pairs of opposite sides that are parallel.
b)Both diagonals of a parallelogram bisect each other.
c)A rectangle is a parallelogram that has all interior angles equal to 90°.
d)Two adjacent sides of a rhombus have different lengths.
e)The diagonals of a kite intersect at right angles.
f)All squares are parallelograms.
g)A rhombus is a kite with a pair of equal, opposite sides.
h)The diagonals of a parallelogram are axes of symmetry.
i)The diagonals of a rhombus are equal in length.
j)Both diagonals of a kite bisect the interior angles.
3.Find all pairs of parallel lines in the following figures, giving reasons in each case.
a)
62 ◦
62 ◦
A B
D C
270 7.5. Chapter summary