In `trgABC` , a=7, b=2, B=`pi`/4 then, c= ?

In Delta ABC , if : a = 5, b = 4, A = pi/2 + B , then : /_C =

In a triangle ABC,a:b:c=4:5:6. Then 3A+B equals to: 4C b.2 pi c. pi-Cd. pi

If in hat harr ABC,A=(pi)/(7),B=(2 pi)/(7),C=(4 pi)/(7) then a^(2)+b^(2)+c^(2) must be R^(2)( b) 3R^(2)(c)4R^(2)(d)7R^(2)

Find the circumcentre of triangle ABC if A (7, 4), B (3, -2) and angle C = (pi)/(3) .