Question

4 Nas figuras seguintes, determine o valor de X: a)52°b)x+25°x-5°c)x 126°d)x+42° x-18°​

Answer 1

Resposta:

a) x=38°

$x+52=90\\x=90-52=38$

b) x=35°

$x+25+x-5=90\\2x=+90-25+5=70\\x=35$

c) x= 54°

$x+126=180\\x=180-126=54$

d) x=78°

$x+42+x-18=180\\2x=180-42+18=156\\x=78$