Question

ex 1 si 2 plzz e urgent​

Answer 1

Ip. ABC triunghi

{<A,<B,<C,<D} d.p {4,5,3}

DC|BC

AD|BC

Triunghiul ABC

=> <A supra 5= <B supra 5=<C supra 3=K

<A =4K

<B=5K

<C=3K

<A+<B+<C=180°

=> 180°÷12=15

<A=4K•15=60

<B=5K•15=75

<C=3K•15=45

<BAC=60°

<ABC=75°

<ACB=45°

ABC-patrulater conex

<ABC=75°

<BCD=90°

AD|B

DC|BC} => AD|CA

=> < ADC=90°

<BAD+<ADC+<DCB+<ABC=360°

<BAD+90°+90°+75°=360°

=>"<BAD=360°-255

<BAD=105°

Ps:| = perpendicular nu am gggggasit semnul sper ca te am ajutat