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
Let ABCD be a parallelogram of area 124 cm2. If E and F are the mid-points of sides AB and
CD respectively, then find the area of parallelogram AEFD.
In the given figure, ABCD is a rectangle with sides AB = 10 cm and AD = 5 cm. Find the area of ΔEFG.
ABCD is a parallelogram. P is the mid-point of AB. BD and CP intersect at Q such that CQ: QP = 3.1. If ar (ΔPBQ) = 10cm2, find the area of parallelogram ABCD.
The diagonal of a rectangular board is 1 m and its length is 96 cm. Find the area of the board.
The side of a square field is 16 m. What will be increase in its area, if each of its sides is doubled?
Which has the bigger area - one of your footprints or the page of this book?
Who had the bigger piece? How much bigger?
Cheggu’s wife asked him to make a circle with the wire. She knew it had an area of 800 square meters.
- Why did Cheggu not choose a rectangle? Explain.
Find the area of the following figure by counting squares:
Find the area of the following figure by counting squares:
