The area of triangle is the area that is enclosed by all three sides of the triangle. To find the area of the triangle on the left substitute the base and the height into the formula for area. So the answer is yes.
Rectangle Area w h w width h height.
Decompose the triangle into smaller pieces and compose them into a parallelogram. Ellipse Area p ab. Triangle Area ½ b h b base h vertical height. It all depends on where the height is drawn.