Question

Plzz plzz answers maths2 9th

Answer 1

Answer:

l.) 1.unique

2.)collinear

3.) reflex

4.) 65°

ll.) a=b

lll.) (5x-3)+(2x+1)=180

=5x+2x-3+1=180

=7x-2=180

=x=180+2/7

=90/7

Answer 2

1st bit

1. parallel lines
2. collinear points
3. reflexangle
4. 65°

2nd

find angle a

first we have to find angle B

anglesB and angle3b are linear pair(180)

so,B+3b=180

4b=180

b=180/4

b=45

then angle b=45

angle 3b=3(45)=135

then angle A+angle 3b is also a linear pair(sum of angles=180)

A+3b=180

A+(135)=180

A=180-135

A=65°

3bit

given ifAOB is a straight line

AO=(5x-3)

COB=2(x+1)

(5x-3)+2(x+1)=180

5x-3+2x+1=180

7x-3+1=180

7x-2=180

7x=180+2

7x=182

x=182/7