HARD
8th CBSE
IMPORTANT
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In the given figure, find the sum of angles marked at the corners P,Q,R,S and T .

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Important Questions on Understanding Quadrilaterals

HARD
8th CBSE
IMPORTANT
NCERT Practice Workbook Mathematics>Chapter 3 - Understanding Quadrilaterals>Worksheet 2>Q 4

Each interior angle of a regular polygon lies between 136° and 142°, then find the number of sides of the polygon.  

MEDIUM
8th CBSE
IMPORTANT
NCERT Practice Workbook Mathematics>Chapter 3 - Understanding Quadrilaterals>Worksheet 2>Q 4
Prove that the interior angle of a regular pentagon is three times the exterior angle of a regular decagon.
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8th CBSE
IMPORTANT
NCERT Practice Workbook Mathematics>Chapter 3 - Understanding Quadrilaterals>Worksheet 2>Q 4
Two regular polygon are such that the ratio between their number of sides is 1:2 and the ratio of measures of their interior angles is 3:4. Find the number of sides of each polygon.
MEDIUM
8th CBSE
IMPORTANT
NCERT Practice Workbook Mathematics>Chapter 3 - Understanding Quadrilaterals>Worksheet 2>Q 4
The exterior angle of a regular polygon is two-fifth of its interior angle. How many sides has the polygon? 
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8th CBSE
IMPORTANT
NCERT Practice Workbook Mathematics>Chapter 3 - Understanding Quadrilaterals>Worksheet 2>Q 5
The polygon in which sum of all exterior angles is equal to the sum of interior angles, is called a triangle.  
MEDIUM
8th CBSE
IMPORTANT
NCERT Practice Workbook Mathematics>Chapter 3 - Understanding Quadrilaterals>Worksheet 2>Q 5
If the interior angles of a triangle are in the ratio 1:2:3, then the ratio of its exterior angles is 3:2:1. 
MEDIUM
8th CBSE
IMPORTANT
NCERT Practice Workbook Mathematics>Chapter 3 - Understanding Quadrilaterals>Worksheet 2>Q 5
If the interior angle of a regular polygon is 120°, then the number of sides of the polygon is 6.  
MEDIUM
8th CBSE
IMPORTANT
NCERT Practice Workbook Mathematics>Chapter 3 - Understanding Quadrilaterals>Worksheet 2>Q 5
Two regular polygons are such that the ratio of the measures of their interior angles is 4:3 and the ratio between their number of sides is 2:1. The number of sides of polygons are 10 and 6.