Question

hey aniruddha,
please reply me........

this question is only for Aniruddha 31​

Answer 1

Step-by-step explanation:

Quadrilateral is formed by Right angle ΔABD and equilateral Δ BCD

Area of ΔABD = ½ * base * height =½*12*5 =30cm²

Area of ΔBCD = √¾*a²

= √3/4 * 169

= 169√3/4

Area of quad ABCD = 30+ 169√3/4

= (120 + 169√3)cm²