Question

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Answer 1

$\large\purple{ \tt (i)}$

$\sf 2 \: acute \: angles( < 90 \degree) :$

$\tt \angle ABF \: \: and \: \: \angle FBE$

$\large{ \purple{ \tt(ii)}}$

$\sf 2 \: obtuse \: angles( > 90 \degree) :$

$\tt\angle ABD \: \: and \: \: \angle FBC$

$\large{ \purple{ \tt(iii)}}$

$\sf pair \: of \: complementary \: angles \\ \sf( \angle x + \angle y = 90 \degree) :$

$\tt\angle ABE \: \: and \: \: \angle DBC$

$\large{ \purple{ \tt(iv)}}$

$\sf 2 \: pairs \: of \: suplementary \: angles\\ \sf( \angle x + \angle y = 180 \degree) :$

$\bf{1.} \tt{\angle ABE \: \: and \: \: \angle EBC}$

$\bf{2.} \tt{\angle ABF \: \: and \: \: \angle FBC}$