Question

in Δlmn l=3 m=5 n=4 state whether Δlmn is aright angled Δ or not state reason ​

Answer 1

Step-by-step explanation:

in triangle lmn,

where l=3,m=5andn=4

so we can say that, in a right angled triangle it is must be equal to: AB^2+BC^2=AC^2