Image caption, You’ve done it! The areas of the two identical triangles form a rectangle with the same base and height as the triangle. The area of this rectangle is base × height. So you've ...

Area of a triangle is half the product of its base and height. Therefore ... What is the area and perimeter of a triangle? The area of any triangle is the total region enclosed within the ...

So he developed what is now known as the perimeter ... triangle use the 21 pennies to build towers on each circle. Each circle must have at least 1 penny, but no two towers can be of the same height.