**Quadrilaterals Class-9 RS Aggarwal** ICSE Goyal Brothers Prakashan Mathematics Solutions Goyal Brothers Prakashan Chapter-11. We provide step by step Solutions of Exercise / lesson-11 **Quadrilaterals** for ICSE** Class-9 RS** **Aggarwal** Mathematics .

Our Solutions contain all type Questions with Exe-11 A, Exe-11 B, to develop skill and confidence. Visit official Website **CISCE** for detail information about ICSE Board Class-9 Mathematics.

Board | ICSE |

Publications | Goyal brothers Prakshan |

Subject | Maths |

Class | 9th |

Chapter-11 | Quadrilaterals |

Writer | RS Aggrawal |

Book Name | Foundation |

Topics | Solution of Exe-11 A, Exe-11 B, to develop skill and confidence |

Academic Session | 2021-2022 |

**Quadrilaterals Class-9 RS Aggarwal** ICSE Mathematics Solutions Goyal Brothers Prakashan Chapter-11

**– : Select Topics :- **

### Notes On Quadrilaterals

Get the complete notes on quadrilaterals class 9 here. A quadrilateral is a shape which has four sides. In this article, we are going to discuss the different types of quadrilaterals such as square, rectangle, parallelogram properties with proofs.

**•**A plane figure bounded by four sides is called a quadrilateral.

**•**Sum of the angles of a quadrilateral is 360°.

**•**A quadrilateral is a parallelogram, if

**•**A diagonal of a parallelogram divides it into two congruent triangles.

**•**Diagonals of a rhombus bisect each other at right angles, and vice versa.

**•**Diagonals of a square bisect each other at right angles and are equal and vice versa.

**•**Diagonals of a rectangle bisect each other and vice versa.

**•**A line segment joining the mid-points of any two sides of a triangle is parallel to the third side.

**•**A line segment joining the mid-points of any two sides of a triangle is half of the third side.

**•**A line through the mid-point of a side of a triangle, parallel to another side bisects the third side.

**•**The quadrilateral formed by joining the mid-points of the sides of a quadrilateral, is a parallelogram.

**QUADRILATERAL**

**Note:**

**ANGLE SUM PROPERTY OF A QUADRILATERAL**

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### Exercise-11.A, **Quadrilaterals Class-9 RS Aggarwal** ICSE Goyal Brothers Prakashan Mathematics Solutions Goyal Brothers Prakashan

Page 135-137

Question 1

In the given Figure ABCD is a parallelogram in ∠A =70 . Calculate ∠ B ∠C and ∠D

Question 2

In the given figure …………. = 105

Question 3

………………..

…………………

………………..

Question 22

in the given figure ABCD is a ……………………….. prove that AF = 2 AB.

**Quadrilaterals Class-9 RS Aggarwal** ICSE Goyal Brothers Prakashan Mathematics Solutions Goyal Brothers Prakashan Exercise-11 B

Page 1343-144

Question 1

Construct a quadrilaterals PQRS in which PQ =4 cm ∠P =90 QR = 4.3 cm and RS = 3.6 cm and SP =3.2 cm

Question 2

Construct a ……… angle ABC = 75

Question 3

…………………

………………..

…………………

Question 22

Construct a regular hexagon of sides 3.5 cm, using ruler and compasses only.

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