Question

2. In figure (i) and (ii) Find the values of a, b and c​

Answer 1

GIVEN;

DAC=60

ACD=70

DAB=30

TO FIND;

ABD=a

ADB=b

ABC=C

IN FIGURE 1

IN ∆ADC

ACD+ADC+DAC=180(ANGLE SUM PROPERTY)

70+c+60=180

130+c=180

c=180-130

c=50 OR ADC=50

ADC+ADB=180(STRAIGHT LINE)

50+ADB=180

50+b=180

b=180-50

b=130 OR ADB=130

IN ∆ABD

ABD+ADB+BAD=180( ANGLE SUM PROPERTY)

a+130+30=180

a+160=180

a=180-160

a=20