$1 {\mathrm{km}}^2=$  ${\mathrm{m}}^2$.

Chapter-Wise 3D Mathematics Videos from NCERT NCERT Exemplar Mathematics - Class 7

02 min 24 sec

Perimeter of a Closed Semicircular Figure

We know how to calculate the circumference or perimeter of a circle. Let’s watch how to calculate the perimeter of a closed semicircular figure in this video.

Read More

03 min 07 sec

Perimeter of Semicircle: Illustration

You must have used a protractor to measure angles in your geometry classes. Do you know how to calculate the perimeter of it? Learn in this video.

02 min 54 sec

Finding Area of Equilateral Triangle

We know that if all sides of a triangle are equal, then it is an equilateral triangle. Is there a formula to find the area of an equilateral triangle? Let's...

Read More