Question

∆ABC = ∆DEF. If AB = 7 cm, BC = 10 cm and DE = 2x - 1, then the
value of x is_____​

Answer 1

since these are the conguent triangles so the lenght of these sides of the triangle will be equal

AB=DE

BC=EF

CA=FD

now, since AB=DE

2x-1=7

2x=8

x=4

so the value of x is 4 and if we put the value in equation then we will get 7 so this verifies that our answer is correct.