Q11 of 56 Page 75

Can all the angles of a quadrilateral be acute angles? Give reason for your answer.

We know that, sum of all angles of a quadrilateral = 360°

So atleast one angle should be obtuse angle.


Hence, all the four angles of a quadrilateral cannot be acute angles.


More from this chapter

All 56 →
9

In Fig.8.1, it is given that BDEF and FDCE are parallelograms. Can you say that BD = CD? Why or why not?

 10

In Fig.8.2, ABCD and AEFG are two parallelograms. If C = 55°, determine F.

 12

Can all the angles of a quadrilateral be right angles? Give reason for your answer.

 13

Diagonals of a quadrilateral ABCD bisect each other. If ÐA = 35°, determine ÐB.