If the sum of the two angles of a quadrilateral is `180^0dot` What is the sum of the remaining two angles?

Prove that the sum of the three angles of a triangle is 180^0dot

The measure of one angle of a parallelogram is 70^0dot What are the measures of the remaining angles?

We know that the sum of the interior angles of a triangle is 180^0 . Show that the sums of the interior angles of polygons with 3,4,5,6 sides form an arithmetic progression. Find the sum of the interior angles of a 21 sided polygon.

We know that the sum of the interior angles of a triangle is 180^0 . Show that the sums of eth interior angles of polygons with 3,4,5,6, sides for an arithmetic progression. Find the sum of the interior angles of or a 21 sided polygon.

One angle of a quadrilateral is 180^0 and the remaining three angles are equal. Find the three equal angles.

Complete each of the following, so as to make a true statement: A quadrilateral has ............ sides A quadrilateral has ............ angles. A quadrilateral has ............ vertices, no three of which are.... A quadrilateral has ............ diagonals. The number of pairs of adjacent angles of a quadrilateral is ...... The number of pairs of opposite angles of a quadrilateral is ...... The sum of the angles of quadrilateral is..... A diagonals of quadrilateral is a line segment that joins two ..... vertices of the quadrilateral. The sum of the angles of a quadrilateral is ......... right angles. The measure of each angle of a convex quadrilateral is ...... 180^0dot In a quadrilateral the point of intersection of the diagonals lie lies in .... of the quadrilateral. A point is in the interior of a convex quadrilateral, if it is in the ....... of its two opposite angles. A quadrilateral is convex if for each side, the remaining.... lie on the same side of the line containing the side.

If the sum of any pair of opposite angles of a quadrilateral is 180^@ ; then the quadrilateral is cyclic.

Prove that the sum of opposite pair of angles of a cyclic quadrilateral is 180^@

The sum of either pair of opposite angles of a cyclic quadrilateral is 180^0 OR The opposite angles of a cyclic quadrilateral are supplementary.

The sum of two opposite angles of a parallelogram is 130^0dot Find all the angles of the parallelogram.