Question

please help me its very urgent .
I will Mark you as a brainlist answer ​

Answer 1

Step-by-step explanation:

I don't know

I will answer for some other question

Answer 2

Answer:

${ab}^{2} + {cd}^{2} = {bd}^{2} + {ac}^{2}$

Step-by-step explanation:

${ab}^{2} = {bd}^{2} + {ad}^{2} \\ PYTHAGOROUS\: THEOREM\\ {ac}^{2} = {ad}^{2} + {cd}^{2} \\PYTHAGOROUS \:THEOREM \\ subtracting \: these \: equations \\ \\ \\ {ab}^{2} - {ac}^{2} = {bd}^{2} - {cd}^{2} \\ \\ \\ therefore \: \: \: {ab}^{2} + {cd}^{2} = {bd}^{2} + {ac}^{2}$