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प्रश्न
Complete of the following, so as to make a true statement:
The sum of the angles of a quadrilateral is ......
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उत्तर
The sum of the angles of a quadrilateral is 360° .
संबंधित प्रश्न
In Fig. 16.19, ABCD is a quadrilateral.
How many pairs of adjacent angles are there?
In a convex hexagon, prove that the sum of all interior angle is equal to twice the sum of its exterior angles formed by producing the sides in the same order.
The sum of the interior angles of a polygon is three times the sum of its exterior angles. Determine the number of sided of the polygon.
Complete the following statement by means of one of those given in brackets against each:
f consecutive sides of a parallelogram are equal, then it is necessarily a ..................
In a trapezium ABCD, side AB is parallel to side DC. If ∠A = x° and ∠D = (3x – 20)°; find the value of x.
Two opposite angles of a parallelogram are 100° each. Find each of the other two opposite angles.
The angles A, B, C and D of a quadrilateral are in the ratio 2 : 3 : 2 : 3. Show this quadrilateral is a parallelogram.
ABCD is a rhombus such that ∠ACB = 40º. Then ∠ADB is ______.
Can we have two obtuse angles whose sum is a reflex angle? Why or why not?
Investigate :
Use strips and fasteners to make a triangle and a quadrilateral.
Try to push inward at any one vertex of the triangle. Do the same to the quadrilateral. Is the triangle distorted? Is the quadrilateral distorted? Is the triangle rigid?
Why is it that structures like electric towers make use of triangular shapes and not quadrilaterals?
