Question

Plz guys solve this it's urgent​

Answer 1

Answer:

Answer is 16

Step-by-step explanation:

please mark as brainliest

Answer 2

Step-by-step explanation:

$to \: prove \: that : \\ \frac{c {}^{2} }{d {}^{2} } = \frac{a {}^{2} + c {}^{2} }{b {}^{2} + d {}^{2} } \\ \\ a : b = c : d \: \: \: \: \: \: (given) \\ \\ \frac{a}{b} = \frac{c}{d} \\ \\ let \: then \\ \frac{a}{b} = \frac{c}{d} = k \\ which \: implies \: that \\ a = bk \: , \: c = dk \\ \\ taking \: LHS \\ = \frac{c {}^{2} }{d {}^{2} } = \frac{(dk) {}^{2} }{d {}^{2} } \\ \\ = \frac{d {}^{2} k {}^{2} }{d {}^{2} } \\ \\ LHS= k {}^{2} \\ \\ now \: taking \: RHS \\ = \frac{a {}^{2} + c {}^{2} }{b {}^{2} + d {}^{2} } \\ \\ = \frac{(bk) {}^{2} + (dk) {}^{2} }{b {}^{2} + d {}^{2} } \\ \\ = \frac{b {}^{2} k {}^{2} + d {}^{2}k {}^{2} }{b {}^{2} + d {}^{2} } \\ \\ = \frac{k {}^{2} (b {}^{2} + d {}^{2} ) }{b {}^{2} + d {}^{2} } \\ \\ = k {}^{2} \\ \\ = LHS$