Right triangle because of the 90. Every triangle having an angle of 90 degrees is a right triangle.
It’s A trust me I just did it
In your question that ask to calculate the area of one of the tiles if a semicircular archway in the front of the garden is using 8 congruent granite tiles and the area of one of the tiles is 2.9ft ^2. I hope you are satisfied with my answer and feel free to ask for more.