Please calculate the area of this right triangle.

There is a complex love triangle between them.

Please calculate the area of this right-angled triangle.

It's difficult to calculate the area of this hexagon.

Let's calculate the area of this right-angled triangle.

Paying the urban planning tax is a citizen's duty.

The United Nations Environment Programme is providing solutions to global environmental problems.

He made a pendant in the shape of a heptagon.

He drew a heptagon with a steady hand.

An obstacle stood in the way of his success.