Question

give me the answer of these questions ​

Answer 1

Step-by-step explanation:

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Answer 2

1st one

angle ABC+100=180 ( ANGLES ON A STRAIGHT LINE)

angleABC=180-100

angle ABC=80

SIMILARLY

angle ACB+115=180

angle ACB=180-115

angle ACB=65

angleABC+angleACB+X=180 (ANGLE SUM PROPERTY )

80+65+X÷180

X=180-145

X=35

2nd one

1x+2x+3x=180

6x=180

x=180/6

x=30

by substituting x

30,60,90