একটি চতুর্ভুজ ABCD একটি বৃত্তকে পরিবৃত্ত করার জন্য আঁকা হয়। প্রমাণ করুন যে 'A B+CD=A D+BC'...

ABCD is a quadrilateral whose diagonals are AC and BD.Which one of the following is correct? (a) vec BA + vec CD = vec AC + vec DB (b) vec BA + vec CD = vec BD + vec CA (c) vec BA + vec CD = vec AC + vec BD (d) vec BA + vec CD = vec BC + vec AD

Find A:B:C:D when A:B = 2:3 ; B:C = 7:9 ; C:D = 5:7

ABCD is rectangle formed by the points A(-1, -1), B(-1, 4), C(5, 4) and D(5, -1). If P, Q, R and S be the midpoint of AB, BC, CD and DA respectively, show that PQRS is a rhombus.

Find the area of the shaded region in figure, in figure, where arcs drawn with centres A, B, C and D intersect in pairs at mid-point P, Q, R and S of the sides AB, BC, CD and DA, respectively of a square ABCD. (use pi = 3.14 )

Find the area of the shaded region in figure, where arcs drawn with centres A, B, C and D intersect in pairs at mid-point P, Q, R and S of the sides AB, BC, CD and DA, respectively of a square ABCD. (Use pi = 3.14 )

Find the area of the shaded region in Fig. 3, where arcs drawn with centres A, B, C and D intersect in pairs at mid-points P, Q, R and S of the sides AB, BC, CD and DA respectively of a square ABCD of side 12 cm. [Use pi=3.14]