Question

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Answer 1

Answer:

given

angle 2= angle 5(alternate interior angle)-------1

anglle 4=angle 5(given)---------2

straight line SB bisects angleAST

angle2= angle3( linear pair)----------3

from 1 ,2 and 3

angle2=angle3=angle4=angle5

triangleSBT

;angle3 + angle4+ angle5

x+x+x=180

3x=180

x=180/3

x=60

angle1=angle4(corresponding angles)

therefore angle1=60

Answer 2

Answer:

Step-by-step explanation:

1+2+3=180

&2=3. because SB. is the bisector

1=4. because corresponding angles

angle 4=180-(2+3). ................ [1]

angle 4=180-(3+5)....................[2]

From 1&2,

2=5 .....................[3]

Hence,

1+2+3=180&

3+5+4=180

3*angle 3=180

angle 3=60

It means angle 1=60