Page 233 - Start Up Mathematics_8 (Non CCE)

2. Draw a line TALK and a parallelogram ALUM. If –KLU = 4 mº and –TAM = 5 mº, what are the values
of m and –AMU?
(a) 20 and 100º (b) 30 and 120º (c) 20 and 80º (d) 30 and 150º
3. A figure that is both a rectangle and a rhombus is:
(a) kite (b) rhombus (c) square (d) rectangle
4. A quadrilateral with two pairs of parallel sides is:
(a) kite (b) quadrilateral (c) trapezium (d) parallelogram
5. A figure in which the longer diagonal bisects the shorter one is:
(a) kite (b) parallelogram (c) rhombus (d) square
6. The angles of a quadrilateral are in the ratio 1 : 2 : 3 : 4. What type of a quadrilateral is formed?
(a) Parallelogram (b) Trapezium (c) Rhombus (d) Square

solve Mentally

Fill in the Blanks
1. A polygon with seven sides is called ____________.
2. Diagonals of a rhombus are ____________ to each other.
3. A polygon with least number of sides is a ____________.
4. A parallelogram with adjacent sides equal is __________________.
5. An octagon has ____________ sides.

Answer in One Word or a Line
1. What is a plane curve? How many types of plane curves are there?
2. Differentiate between a convex and a concave quadrilateral.
3. Give the properties of a kite.
4. What is a trapezium? How is an isosceles trapezium different from a right trapezium?
5. Give the properties common to both a parallelogram and a rectangle.

let’s evaluate
K N
1. PINK is a rhombus with –IPK = 64º. Find –IKN.
O

64°
P I
2. The diagonals of a rhombus are 6 cm and 8 cm. Find the length of a
side of the rhombus.
3. The diagonals of a rectangle ABCD meet at point O.
If –BOC = 44º, find –OAD. D C
4. Two opposite angles of a parallelogram are (3x – 2)º and (50 – x)º. O
Find the measure of each angle of the parallelogram.
5. In the parallelogram ABCD, the bisectors of –A and –B meet at point
O. Find –AOB. B
A

6. SNAP is a parallelogram in which –PSO = 50º and –NSO = 25º and P A
–AOP = 60º. Find –SNO, –OPA, –SAN and –ANP. 60°

O
50°
S 25° N

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