Selina Concise Class 9 Maths Chapter 16 Area Theorems Exercise 16C Solutions EXERCISE – 16C (Q1) In the given figure, the diagonals AC and BD intersect at point O if OB = OD and AB||DC, show that: (i) Area (△DOC) = Area (△AOB) (ii) Area (△DCB) = Area (△ACB) (iii) ABCD is a parallelogram Solution: […]

### Category: Selina Concise

## Selina Concise Class 9 Maths Chapter 16 Area Theorems Exercise 16B Solutions

Selina Concise Class 9 Maths Chapter 16 Area Theorems Exercise 16B Solutions EXERCISE – 16B (Q1) Show that: (1) (i) A diagonal divides a parallelogram into two triangles of equal area. (ii) The ratio of the areas of two triangles of the same height is equal to the ratio of their bases. (iii) The ratio […]

## Selina Concise Class 9 Maths Chapter 16 Area Theorems Exercise 16A Solutions

Selina Concise Class 9 Maths Chapter 16 Area Theorems Exercise 16A Solutions EXERCISE – 16A (Q1) In the given figure, if area of triangle ADE is 60cm2, state, given reason, the area of! (i) Parallelogram ABED (ii) Rectangle ABCF (iii) Triangle ABE Solution: Given, Area (△ADE) = 60cm2 Find: (i) Area (ABED) (ii) Rectangle […]

## Selina Concise Class 9 Maths Chapter 26 Co-ordinate Geometry Exercise 26C Solutions

Selina Concise Class 9 Maths Chapter 26 Co-ordinate Geometry Exercise 26C Solutions EXERCISE – 26C (Q1) In each of the following, find the inclination of line AB. Solution: (i) The sum of angles of triangle is 180° The inclination of line AB is θ = 45° {45° + 45° + 90° = 180°} (ii) […]

## Selina Concise Class 9 Maths Chapter 26 Co-ordinate Geometry Exercise 26B Solutions

Selina Concise Class 9 Maths Chapter 26 Co-ordinate Geometry Exercise 26B Solutions EXERCISE – 26B (Q1) Draw the graph for each linear equation given below. (i) x = 3 Solution: X 3 3 3 y 4 0 -3 x = 3 is parallel to y-axis. (ii) x + 3 = 0 Solution: x + 3 […]

## Selina Concise Class 9 Maths Chapter 26 Co-ordinate Geometry Exercise 26A Solutions

Selina Concise Class 9 Maths Chapter 26 Co-ordinate Geometry Exercise 26A Solutions EXERCISE – 26A (Q1) For each equation given below; name the dependent and independent variables. (i) y = 4/3 x – 7 Solution: If we have to put the value of x then we have to find the value of y. E.x. y […]

## Selina Concise Class 9 Maths Chapter 9 Triangles Exercise 9B Solutions

Selina Concise Class 9 Maths Chapter 9 Triangles Exercise 9B Solutions EXERCISE – 9B (1) On the sides AB and AC of triangles ABC, equilateral triangle ABD and ACE are drawn. prove that: (i) ∠CAD = ∠BAE (ii) CD = BE Solution : Given, ABD and ACE are equilateral triangles. To prove : (i) […]

## Selina Concise Class 9 Maths Chapter 9 Triangles Exercise 9A Solutions

Selina Concise Class 9 Maths Chapter 9 Triangles Exercise 9A Solutions EXERCISE – 9A (1) Which of the following pairs of triangles are congruent? In each case, stat the condition of congruency: (a) In △ABC and △ DEF , AB = DE, BC = EF and ∠B = ∠ E (b) In △ABC and […]

## Selina Concise Class 9 Maths Chapter 14 Rectilinear Figures 14B Solutions

Selina Concise Class 9 Maths Chapter 14 Rectilinear Figures Exercise 14B Solutions EXERCISE – 14B Exercise – 14.2 (1) State, ‘true’ or ‘False’ (i) The diagonals of a rectangle bisect each other => True : We can see diagram, The diagonals of a rectangle bisect each other. (ii) The diagonals of a quadrilateral bisect […]

## Selina Concise Class 9 Maths Chapter 14 Rectilinear Figures 14A Solutions

Selina Concise Class 9 Maths Chapter 14 Rectilinear Figures Exercise 14A Solutions EXERCISE – 14A (1) The sum of the interior angles of a polygon is four times the sum of it’s a exterior angles. Find the number of sides in the polygon. Solution : Sum of interior = 4 × sum of it’s exterior […]