Page 152 - Math Smart - 7

4. Rhombus Two pairs of Diagonals /4Cand BD
parallel sides. are not equal but are
AB/IDQADIIBC perpendicular.
They also bisect each
All sides are equal.
other.
AB = BC=CD = AD

5. Kite No parallel sides. Diagonals AC and BD
are perpendicular.
Adjacent sides are
equal.

AB = AD, CB = CD

6. Trapeziums One pair of Diagonals AC and BD
A D parallel sides. are not equal and do
not bisect each other.
ADIIBC

O ABCD is a square. Find the following angles.
a) ^ADC b) Ax

c) Z.CMD d) Ay

Solution
a) ABCD is a square. Each angle at the corner of
So, zl4DC=90°. a square is a right angle.

b) ABCD is a square. The diagonals of a square are
So, Ax = 90°. perpendicular to each other.

c) ABCD is a square. The diagonals of a square are
So, ACMD = 90°. perpendicular to each other.

UNIT 6 Angles and Their Properties