ude from D of ΔABD AND DC is parallel AB
Similarly, AD is parallel BC. Hence, ABCD is a parallelogram.
32. The difference between the semi-perimeter and the sides of triangle ABC are 8 cm, 7 cm and 5 cm, respectively. Find its semi-perimeter.
SOL:- Let the semi-perimeter of the triangle be s. Sides of the triangle is a, b and c.
s – a = 8
s – b = 7
s – c = 5
Adding all the equations, we get
(s – a) + (s – b) + (s – c) = 8 + 7 + 5
⇒ 3s – (a + b + c) = 20
⇒ 3s – 2s = 20 AND s = 20 cm
Click following to get pdf of Maths Sample Paper for Class 9
Clicf following to get 9th Class AP State Syllabus Question Papers
Feel free for any kind of suggestion in the commenting section below related to the content of Sample paper or any other.