Circles- class 9

A circle Passing through all three vertices of a triangle is called _________ of the triangle

Chords at the same distance are of _______ length

• Different

• Twice

• Same

• Thrice

The longest chord of a circle is called ______

• Diameter

• Long chord

• Radius

• Tangent

If AB and CD are chords of a circle with center O and the values are given in the figure. What is the length of CD?

• 2 cm

• 5 cm

• 4 cm

• 6 cm

The circum center of the right angled triangle lies at the _________ of the triangle.

• Midpoint of the base of the triangle

• Endpoint of the hypotenuse of the triangle

• Midpoint of the hypotenuse of the triangle

• Midpoint of the altitude of the triangle

In the figure , let AB be the diameter of the circle. CD and EF be the equal chords. If < COA= 40° , what is <AOF?

• 40°

• 20°

• 50°

• 80°

The perpendicular from the centre of a circle to a chord _________ the chord

What is the angle around a point?

• 180°

• 90°

• 270°

• 360°

In the figure, If O is the centre of a circle and OE is the perpendicular drawn to the chord AB and if AB= 6 cm, then what is the value of BE?

• 3 cm

• 4 cm

• 2 cm

• 5 cm

Which of the following is Pythagoras theorem

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