Triangles and Circles (IMO- Mathematics Olympiad Class 9): Questions 38 - 41 of 79

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Question number: 38

» Triangles and Circles

MCQ▾

Question

An exterior angle of a triangle is 139˚ and one of the interior opposite angle is 49˚. Then the other two angles of a triangle are

Given the exteriorangle 139 and interiorangle of a triangle 49

Given the Exteriorangle 139 and Interiorangle of a Triangle 49

Given the exterior angle of a triangle is 139 and one of the interior opposite angle is 49 and fined the other two angles

Choices

Choice (4) Response

a.

75°,45°

b.

91°,76°

c.

62°,65°

d.

90°,41°

Question number: 39

» Triangles and Circles

MCQ▾

Question

In the adjoining figure, the value of A+B+C+D+E+F is________.

ABCDEF is given, find sum of all angles

ABCDEF Is Given, Find Sum of All Angles

ABCDEF is an adjoining figure is given, find the sum of all angles

Choices

Choice (4) Response

a.

180°

b.

360°

c.

540°

d.

270°

Question number: 40

» Triangles and Circles

MCQ▾

Question

C1 is a circle of radius 6 cm, C2 is a circle of radius 8 cm. Jyoti wants the two circles to touch tangentially. She knows that there are two possibilities for the distance between their centers. What are these two distances?

Choices

Choice (4) Response

a.

6 cm and 8 cm

b.

2 cm and 14 cm

c.

3 cm and 4 cm

d.

2 cm and 8 cm

Question number: 41

» Triangles and Circles

MCQ▾

Question

The point concurrency of medians of a triangle is called ________.

Choices

Choice (4) Response

a.

Incenter

b.

Centroid

c.

Orthocenter

d.

Circumcenter

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