Page 241 - Start Up Mathematics_8 (Non CCE)

2. Taking R as centre and radius = 5 cm, draw an arc
above line RI.

R 7 cm I

N
3. Taking I as centre and radius = 7 cm, draw another
arc intersecting the arc in step 2 at N. Join NR
and NI.
5 cm 7 cm

R 7 cm I

N
4. Taking R as centre and radius = 6 cm, draw an arc
below line RI.

5 cm 7 cm

R 7 cm I

N
5. With N as centre and radius = 7.5 cm, draw an arc
intersecting the arc in step 4 at A. Join RA, NA and AI.
5 cm 7 cm

7 cm 7.5 cm
R I
Hence, RAIN is the required quadrilateral. 6 cm

A
Example 5: Construct a rhombus BEND in which diagonal
BN = 5.6 cm and diagonal DE = 6.5 cm. (NCERT)
Solution: Construction: Draw a rough sketch of the figure to be
constructed.
B
Note: Diagonals of a rhombus are perpendicular bisectors of
each other. Also, all the sides of a rhombus are equal. 5.6 cm

Steps of Construction: D E
6.5 cm O
1. Draw a line DE (diagonal) = 6.5 cm.

D 6.5 cm E N

233