# Properties of Triangles · Mathematics · NDA

Start Practice## MCQ (Single Correct Answer)

NDA Mathematics 21 April 2024

$ABC$ is a triangle such that angle $C = 60^{\circ}$, then what is $\frac{\cos A + \cos B}{\cos \left(\frac{A - B}{2}\right)}$ equal to?

NDA Mathematics 21 April 2024

In a triangle $ABC$, $AB=16 \text{ cm}, BC=63 \text{ cm}$ and $AC=65 \text{ cm}$. What is the value of $\cos 2A+\cos 2B+\cos 2C$?

NDA Mathematics 21 April 2024

Consider the following statements:1. In a triangle $ABC$, if $\cot A \cdot \cot B \cdot \cot C>0$, then the triangle is an acute-angled triangle.2. In...

NDA Mathematics 3 September 2023

What is the value of a + b + √2 c equal to ?

NDA Mathematics 3 September 2023

What is the ratio of a2 ∶ b2 ∶ c2 ?...

NDA Mathematics 16 April 2023

What is the perimeter of the triangle ?

NDA Mathematics 16 April 2023

Consider the following statements :
1. ABC is right angled triangle
2. The angles of the triangle are in AP
Which of the statements given above is/...

NDA Mathematics 16 April 2023

What is the nature of the triangle ?

NDA Mathematics 16 April 2023

If c = 8, what is the area of the triangle ?

NDA Mathematics 16 April 2023

What is the value of n ?

NDA Mathematics 16 April 2023

What is the length of the smallest side ?