Question

Va rog repede 1 și 2
Dau coroana plus 20 de puncte ​

Answer 1

1.

a)

<D=57°

<B=68°

<E=180°-(<D+<B)=180-(125)=55°

b)

<B=180°-138°=43°

{<D;<E} d.p {14,9}

<D/14=<E/9=k

<D=14k

<E=9k

<D+<E+<B=180°

14k+9k+42°=180°|-42°

23k=138°|:23

k=6=> <D=14•6=84°

<E=9•6=54°

c)

<E=90°

{<D;<B} i.p {7,8}

7<D=8<B=k

<D=k/7

<B=k/8

<D+<E+<B=180°

k/7+k/8+90°=180°|-90°

k/7+k/8=90°

$\frac{8k + 7k}{56} = 90 \ \times 56$

=>15k=5040°|:15

=>k=336° => <D=336/7=48°

<B=336/8=42°

d)

<D=26°

<E=<B

<D+<E+<B=180°

26°+2<E=180°|-26°

2<E=154°|:2

<E=77°=<B

2.180°-60°=120°

pls coroană