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प्रश्न
Give reason for the following :
Squares, rectangles, parallelograms are all quadrilaterals.
उत्तर
All are closed figures made of 4 line segments. Therefore, all these are quadrilaterals.
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संबंधित प्रश्न
Show that the diagonals of a square are equal and bisect each other at right angles.
Diagonal AC of a parallelogram ABCD bisects ∠A (see the given figure). Show that
- It bisects ∠C also,
- ABCD is a rhombus
In the given figure ABCD is a rhombus with angle A = 67°
If DEC is an equilateral triangle, calculate:
- ∠CBE
- ∠DBE
The given figure shows a square ABCD and an equilateral triangle ABP. 
Calculate: (i) ∠AOB
(ii) ∠BPC
(iii) ∠PCD
(iv) Reflex ∠APC
In the given figure, PT ∥ QR and QT ∥ RS. Show that: area of ΔPQR = area of ΔTQS.
*Question modified
A quadrilateral ABCD is such that diagonals BD divides its area into two equal parts. Prove that BD bisects AC.
All the sides of a parallelogram are of equal length.
Give reason for the following :
Square is also a parallelogram.
Examine whether the following is a polygon. If it is not, say why?
Name polygon.
Make two more examples of this.
