Q7 of 56 Page 75

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

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

So atleast one angle should be acute angle.


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


More from this chapter

All 56 →
5

All the angles of a quadrilateral are equal. What special name is given to this quadrilateral?

 6

Diagonals of a rectangle are equal and perpendicular. Is this statement true? Give reason for your answer.

 8

In ∆ABC, AB = 5 cm, BC = 8 cm and CA = 7 cm. If D and E are respectively the mid-points of AB and BC, determine the length of DE.

 9

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