To find the area of a triangle you find the hight and length and multiply them which in this case would be 84. Then, you divide it by two because a triangle is half of a square which would equal 42. Lastly, you do the same with the left side of the triangle which would equal 10.5. then, you add 42 and 10.5 together and your answer is 52.5.
If there are 2 or more right angles in a triangle, it is impossible to connect without a fourth side, making it a square. There can only be 1 right angle in a triangle
