Answer of all these questions
Answers
1.0 is the answer as in the parallelogram pqrs angle p and angle r are opposite angles.
2.Hence, the figure obtained is a rectangle.
3.I don't know the answer.
4.The midpoint theorem states that “The line segment in a triangle joining the midpoint of two sides of the triangle is said to be parallel to its third side and is also half of the length of the third side.”
5.We have,
ABCD as a trapezium
so, AB || CD
It means that,
Angle B + Angle C = 180° (angle on the same side)
=> 60 ° + angle C = 180 °
=> angle c = 180 ° - 60 ° = 120 °
6.Parallelogram is the special name can be given to this quardilateral.
7.Here we will prove that if in a parallelogram the diagonals are equal in length and intersect at right angles, the parallelogram will be a square. To prove: PQRS is a square, i.e., PQ = QR = RS = SP and an angle, say ∠SPQ = 90°.
8. Angle P+Q=180degree (co-interior angle)
45degree+Q=180degree
Q=180-45 degree
Q=135 degree
9.No, all the four angles of a quadrilateral cannot be obtuse. As, the sum of the angles of a quadrilateral is 360°, then may have maximum of three obtuse angles.
I know this much only i hope thiswill help you