The figure formed by joining the midpoints of the adjacent sides of a rectangle of sides 8cm and 6cm is a
Given: A rectangle with sides 8cm and 6cm.
Consider the Rectangle ABCD
Here DR = RD = AP = PB = 8/2 = 4cm (∵ P and R are the midpoints of DC and AB respectively)
and AS = SD = BQ = QC = 6/2 = 3cm(∵ S and Q are the midpoints of AD and BC respectively)
Now, consider the ΔRSD
By Pythagoras theorem
SR2 = SD2 + DR2
SR2 = 32 + 42
SR2 = 9 + 16
SR2 = 25
SR = 5 cm
Similarly using Pythagoras theorem in ΔQRC , ΔPBQ and ΔAPS
We get RQ = QP = PS = 5cm
∴ SR = RQ = QP = PS = 5cm
∴ PQSR is Rhombus of side length 5cm
Area of the rhombus is given by:
∴ Area of the rhombus = = = 24cm2
∴ Area(PQRS) = 24cm2