# Parallel Lines And Co Interior Angles Free Doubts and Solutions

### CBSE - IX - Mathematics - Lines and Angles

## can u explain me the full chapter sir

**Veena**1st August 2016, 11:55 AM

### CBSE - IX - Mathematics - Lines and Angles

## In figure, AB||DC, BDC = 30° and BAD = 80°, find x, y and z.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## AB and CD are the bisectors of the two alternate interior angles formed by the intersection of a transversal 't' with parallel lines l and m (Shown in Figure) Show that AB||CD.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## In the given figure, l||m, then find the value of x?

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## If fig., if AB||CD, EFCD and GED = 126°, find AGE, GEF and FGE.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## In figure, prove that .

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## In given figure, find the values of x and y.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## In fig., AB||CD and CD||EF. Also EA AB. If BEF= 40o, then find x, y, z.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## In fig., if AB||CD, APQ = 50o and PRD = 127o, find x and y.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## In fig., l||m, show that 1 + 2 - 3 = 180o

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## In fig., PQ||RS and T is any point as shown in figure then show that PQT + QTS + RST = 360o

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## In figure, if AB||CD then find PQR.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## In figure prove that l||m.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## In fig., l1||l2 and m1||m2. Prove that 1 + 2 = 180o.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## Lines AB and CD are parallel and P is any point between the two lines as shown in figure. Show that DPB = x + y.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## In figure, if AB||DE, ABC = 75o and CDE = 145o, then find BCD.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## In figure, PQ PS, PQ||SR, SQR = 25o and QRT = 65o. Find the value of x and y.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## If the arms of one angle are respectively parallel to the arms of another angle, as shown in the figure then prove that the two angles are supplementary.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## Prove that two lines which are parallel to the same line are parallel to one another.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## AB || CD. Find the values of p, q and r.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## For what value of x will the lines m and n be parallel to each other?

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## The arms of an angle are respectively parallel to the arms of another angle as shown in the figure. Show that the two angles are equal.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## In the given figure, AB || CD. Find the values of x, y and z.

**Topperlearning User**4th June 2014, 1:23 PM

### CBSE - IX - Mathematics - Lines and Angles

## Two parallel lines are intersected by a transversal in such a way that, the co-interior angles such that one angle is thrice the other. Find the angles.

**Topperlearning User**4th December 2013, 1:25 AM

### CBSE - IX - Mathematics - Lines and Angles

## RS || PQ. Find the value of x.

**Topperlearning User**30th April 2013, 9:00 AM