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9th West Bengal Board
IMPORTANT
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Circum-centre, incentre, centroid and orthocentre will be the same of

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Important Questions on Theorems on Concurrence

EASY
9th West Bengal Board
IMPORTANT
MATHEMATICS CLASS 9>Chapter 13 - Theorems on Concurrence>EXERCISE-1>Q 1
I is the incentre of the △ABC, ∠BAC=44°, then ∠BIC=
EASY
9th West Bengal Board
IMPORTANT
MATHEMATICS CLASS 9>Chapter 13 - Theorems on Concurrence>EXERCISE-1>Q 1
O is the Orthocentre of the △ABC, ∠BAC=55°, then ∠BOC= then find k.
EASY
9th West Bengal Board
IMPORTANT
MATHEMATICS CLASS 9>Chapter 13 - Theorems on Concurrence>EXERCISE-1>Q 2
The length of the circumradius of the right-angled triangle is 4 cm. Find its length of hypotenuse in cm.
HARD
9th West Bengal Board
IMPORTANT
MATHEMATICS CLASS 9>Chapter 13 - Theorems on Concurrence>EXERCISE-1>Q 2
In the right-angled triangle ABC, ∠ABC=90°, AB=5 cm and BC=12 cm, then find its length of circum-radius in cm.
HARD
9th West Bengal Board
IMPORTANT
MATHEMATICS CLASS 9>Chapter 13 - Theorems on Concurrence>EXERCISE-1>Q 2
In the right-angled triangle ABC, ∠ABC=90°, AB=6 cm and BC=8 cm, then find its length of circum-radius in cm. 
MEDIUM
9th West Bengal Board
IMPORTANT
MATHEMATICS CLASS 9>Chapter 13 - Theorems on Concurrence>EXERCISE-1>Q 2
∆ABC is an equilateral and AD is a median of it. If G be the centroid of ∆ABC and GD= 10 cm, find the length of GB.
HARD
9th West Bengal Board
IMPORTANT
MATHEMATICS CLASS 9>Chapter 13 - Theorems on Concurrence>EXERCISE-1>Q 2
∆ABC is an equilateral triangle of sides 6 cm. If G be its centroid and the length of AG=k cm then find k. (Take 3=1.732 and write answer correct up to two decimal places)
MEDIUM
9th West Bengal Board
IMPORTANT
MATHEMATICS CLASS 9>Chapter 13 - Theorems on Concurrence>EXERCISE-1>Q 2
What is pedal triangle? ∆ABC is an obtuse triangle of which ∠B is obtuse, construct its pedal triangle.