Advertisements
Advertisements
प्रश्न
In parallelogram ABCD, ∠A = 90°
(i) What is the measure of angle B.
(ii) Write the special name of the parallelogram.
Advertisements
उत्तर
In parallelogram ABCD, ∠A = 90°
(i) ∵ In a parallelogram, adjacent angles are supplementary
∴ ∠A + ∠B = 180°
⇒ 90° + ∠B = 180°
⇒ ∠B = 180° - 90°
⇒ ∠B = 90°
(ii) The name of the given parallelogram is a rectangle.
APPEARS IN
संबंधित प्रश्न
What is the sum of the measures of the angels of a convex quadrilateral? Will this property hold if the quadrilateral is not convex? (Make a non-convex quadrilateral and try!)
In a quadrilateral, define of the following Opposite sides .
ABCDE is a regular pentagon. The bisector of angle A of the pentagon meets the side CD in point M. Show that ∠AMC = 90°.
In the quadrilateral ABCD, AB = BC and AD = DC Measure of ∠BCD is
A diagonal of a rectangle is inclined to one side of the rectangle at 25º. The acute angle between the diagonals is ______.
The diagonals of the quadrilateral DEFG are ______ and ______.
In the following figure, ∠XYZ cannot be written as ______.
If the sum of two angles is greater than 180°, then which of the following is not possible for the two angles?
The number of right angles in a straight angle is ______ and that in a complete angle is ______.
The common part between the two angles BAC and DAB in the following figure is ______.
