Fill in the blanks so as to make the following statements true: (i) If one angle of a linear pair is acute, then its other angle will be .......... (ii) A ray stands on a line, then the sum of the two adjacent angles so formed is .................. (iii) If the sum of two adjacent angles is `180^0`, then the ............ arms of the two angles are opposite rays.

In a parallelogram the sum of any two adjacent angles is 180^0dot

Can two acute angles from a linear pair?

Fill in the blanks to make the following statements true: Sum of the angles of a triangle is ............ An exterior angle of a triangle is equal to the two ............ opposite angles. An exterior angle of a triangle is always ............ than either of the interior opposite angles. A triangle cannot have more than ............ right angles. A triangles cannot have more than ............ obtuse angles.

One of the angles forming a linear pair is an acute angle. What kind of angle is the other?

If one angle of a triangle is equal to the sum of the other two angles, then the triangle is

Fill in the blanks to make the following statements true: In a right triangle the hypotenuse is the ...... side. The sum of three altitudes of a triangle is ......... than its perimeter. The sum of any two sides of a triangle is ......... than the third side. If two angles of a triangle are unequal, then the smaller angle has the ........... side opposite to it. Difference of any two sides of a triangle is ......... than the third side. If two sides of a triangle are unequal, then the larger side has ..... angle opposite to it.

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 two consecutive angles of a parallelogram is 180^(@).

One of the angles forming a linear pair is a right angle. What can you say about its other angle?

If one angle of a triangle is 60^0 and the other two angles are in the ratio 1:2, find the angles.