Advertisements
Advertisements
प्रश्न
Compute the area of trapezium PQRS is Fig. below.
Advertisements
उत्तर
We have
ar (trap PQRS) = ar (rect PSRT) + are a (ΔQRT)
⇒ ar (trap .PQRS) = PT × RT =`1/2`(QT × RT)
= `8 xx RT = 1/2 ( 8 xx RT ) = 12 xx RT `
In , ΔQRT , we have
QR2 = QT2 + RT2
⇒ RT 2 = QR2 - QT2
⇒ ( RT )2 = 172 - 8 2 = 225
⇒ RT = 15
Hence, ar (trap . PQRS ) = 12 × 15cm 2 = 180 cm2
APPEARS IN
संबंधित प्रश्न
In a ΔABC if D and E are mid-points of BC and AD respectively such that ar (ΔAEC) = 4cm2, then ar (ΔBEC) =
Find the area of a rectangle whose length = 15 cm breadth = 6.4 cm
The side of a square field is 16 m. What will be increase in its area, if each of its sides is increased by 4 m?
Who had the bigger piece? How much bigger?
The amount of region enclosed by a plane closed figure is called its ______.
The region given in the following figure is measured by taking 
as a unit. What is the area of the region?
Find the area of the following figure by counting squares:
Find the area of the following figure by counting squares:
Find the area of the following figure by counting squares:
Find the area of the following figure by counting squares:
