Prove that the bisectors of opposite angles of a parallelogram are parallel.

Important Questions on Rectilinear Figures [Quadrilaterals : Parallelogram, Rectangle, Rhombus, Square and Trapezium]

EASY

9th ICSE

IMPORTANT

Concise Mathematics I.C.S.E - Class IX>Chapter 14 - Rectilinear Figures [Quadrilaterals : Parallelogram, Rectangle, Rhombus, Square and Trapezium]>EXERCISE>Q 1

The sum of the interior angles of a polygon is four times the sum of its exterior angles. Find the number of sides in the polygon.

EASY

9th ICSE

IMPORTANT

Concise Mathematics I.C.S.E - Class IX>Chapter 14 - Rectilinear Figures [Quadrilaterals : Parallelogram, Rectangle, Rhombus, Square and Trapezium]>EXERCISE>Q 2

The angles of a pentagon are in the ratio $4:8:6:4:5$. Find each angle of the pentagon.

EASY

9th ICSE

IMPORTANT

Concise Mathematics I.C.S.E - Class IX>Chapter 14 - Rectilinear Figures [Quadrilaterals : Parallelogram, Rectangle, Rhombus, Square and Trapezium]>EXERCISE>Q 3

One angle of a six-sided polygon is $140°$ and the other angles are equal. Find the measure of each equal angle.

MEDIUM

9th ICSE

IMPORTANT

Concise Mathematics I.C.S.E - Class IX>Chapter 14 - Rectilinear Figures [Quadrilaterals : Parallelogram, Rectangle, Rhombus, Square and Trapezium]>EXERCISE>Q 4

In a polygon there are $5$ right angles and the remaining angles are equal to $195°$ each. Find the number of sides in the polygon.

EASY

9th ICSE

IMPORTANT

Concise Mathematics I.C.S.E - Class IX>Chapter 14 - Rectilinear Figures [Quadrilaterals : Parallelogram, Rectangle, Rhombus, Square and Trapezium]>EXERCISE>Q 5

Three angles of a seven sided polygon are ${132}^0$ each and the remaining four angles are equal. Find the value of each equal angle.

EASY

9th ICSE

IMPORTANT

Concise Mathematics I.C.S.E - Class IX>Chapter 14 - Rectilinear Figures [Quadrilaterals : Parallelogram, Rectangle, Rhombus, Square and Trapezium]>EXERCISE>Q 6

Two angles of an eight sided polygon are $142°$ and $176°$. If the remaining angles are equal to each other. Find the magnitude of each of the equal angles.

EASY

9th ICSE

IMPORTANT

Concise Mathematics I.C.S.E - Class IX>Chapter 14 - Rectilinear Figures [Quadrilaterals : Parallelogram, Rectangle, Rhombus, Square and Trapezium]>EXERCISE>Q 7

In a pentagon $\mathrm{ABCDE}, \mathrm{AB}$ is parallel to $\mathrm{DC}$ and $\mathrm{A}:\angle \mathrm{E}:\angle \mathrm{D}=3:4:5$. Find angle $E.$

EASY

9th ICSE

IMPORTANT

Concise Mathematics I.C.S.E - Class IX>Chapter 14 - Rectilinear Figures [Quadrilaterals : Parallelogram, Rectangle, Rhombus, Square and Trapezium]>EXERCISE>Q 8

$AB, BC$ and $CD$ are the three consecutive sides of a regular polygon. If $\angle \mathrm{BAC}=15°$; find each interior angle of the polygon.