Seudónimo Seudónimo
  • 04-08-2020
  • Mathematics
contestada

in triangle ABC A-B= 15 degree, B-C= 30 degree find A,B,C

Respuesta :

swan85 swan85
  • 04-08-2020

Answer:

A=80 , B=65, C=35

Step-by-step explanation:

A-B=15 ⇒A=B+15

B-C=30⇒-C=30-B ⇒C=B-30

the sum of angle of a triangle = 180

A+B+C=180 ( substitute A and C)

B+15+B+B-30=180

3B-15=180

3B=180+15

B=195/3=65

C=B-30 ⇒ C=65-30=35

A=B+15=65+15=80

check : A+B+C=180

             80+65+35=180 ( correct)

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