Question

Dau coroanaa! Ajutați-mă repede ​

Answer 1

Aria trapezului: (B+b)×h/2

B=DC=16 cm

b=AB=6 cm

h=AF= 12 cm

${13}^{2} - {5}^{2} \\ = \sqrt{144} \\ = 12 \: cm$

Aria trapezului:

(16+6)×12/2

=22×6

=132 cm

Deci răspunsul corect este: a)132

Answer 2

Semiperimetrul este: p = (6+13+16+13):2=48:2=24 cm

$\it \mathcal{A}= \sqrt{(24-6)(24-13)(24-16)(24-13)}=\sqrt{18\cdot11\cdot8\cdot11}=\\ \\ =\sqrt{144\cdot121}=12\cdot11=132\ cm^2$