11th Class FA Mathematics Chapter 12 Online Test

A circle which touches one side of a triangle externally and the other two produces sides internally is known as:

• 
  A
• 
  B
• 
  C
• 
  D

If 2s = a + b + c, then in any triangle ABC:

• 
  A
• 
  B
• 
  C
• all of these D

• r₁ A
• r₂ B
• r₃ C
• r D

The circum-radius R of a triangle is given by:

• 
  A
• 
  B
• 
  C
• 
  D

• right angled A
• equilateral B
• isosceles C
• obtuse angled D

If 2s = a + b + c, where a, b, c are the sides of a triangle ABC, then area of triangle ABC is given by:

• 
  A
• 
  B
• 
  C
• 
  D

In 2s = a + b + , then in any triangle ABC:

• 
  A
• 
  B
• 
  C
• all of above D

In triangle the length of the sides are 7, 4√3 and √13. Then the smallest angle is:

• 15° A
• 30° B
• 60° C
• 45° D

If 2s = a + b +c, then in any triangle ABC:

• 
  A
• 
  B
• 
  C
• none of these D

A circle passing though the vertices of a triangle is known as:

• 
  A
• 
  B
• 
  C
• 
  D

In a right isoceles triangle, one acute angle is:

• 30° A
• 45° B
• 60° C
• 75° D

In triangle ABC, If Γ = 90° then:

• 
  A
• 
  B
• 
  C
• b = c + a D

In triangle ABC, if α = 90° then:

• 
  A
• 
  B
• 
  C
• none of these D

In any triangle ABC, law of cosines is:

• 
  A
• 
  B
• 
  C
• 
  D

r₁ =

• 
  A
• 
  B
• 
  C
• 
  D

In a triangle ABC if a² - b² + c² = ac then < ß =

• 
  A
• 
  B
• 
  C
• 
  D

With usual notations for triangle R equals:

• 
  A
• 
  B
• 
  C
• 
  D

A triangle which is not right angle triangle called ________ triangle:

• acute A
• obtuse B
• right C
• oblique D

The in-radius r of a triangle is given by:

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D