Can all the four angles of a quadrilateral be obtuse angles? Give reason for your answer
The poems and the song in this Unit allow you to see the range of ways in which individuals and
communities express their opinions, their anger and their sorrow. In class, do the following two
exercises:
(a) Bring to class a poem that discusses a social issue. Share this with your classmates. Work in
small groups with two or more poems to discuss their meaning as well as what the poet is
trying to communicate.
(b)Identify a marginalised community in your locality. Write a poem, or song, or draw a poster
etc to express your feelings as a member of this community.
Diagonals of a rectangle are equal and perpendicular. Is this statement true? Give reason for your answer
Why do Adivasi activists, including C.K. Janu, believe that Adivasis can also use this 1989 Act to
fight against dispossession? Is there anything specific in the provisions of the Act that allows her to
believe this?
All the angles of a quadrilateral are equal. What special name is given to this quadrilateral?
In quadrilateral ABCD, ∠A + ∠D = 180º. What special name can be given to this quadrilateral?
Re-read the story on Rathnam as well as the provisions of the 1989 Scheduled Castes and
Scheduled Tribes (Prevention of Atrocities) Act. Now list one reason why you think he used this
law to file a complaint.
Can the angles 110º, 80º, 70º and 95º be the angles of a quadrilateral? Why or why not?
Diagonals of a parallelogram are perpendicular to each other. Is this statement true? Give reason for your answer.
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