单选题
In the figure above, XY= YZ, and XZ is a diameter of the circle, having a length of 10 inches. What is the area of △XYZ, in square inches?
【正确答案】
【答案解析】25The formula for the area of a triangle is 
. The base of the triangle is 10 (the diameter of the circle) and the height of the triangle is 5 (the radius of the circle). Therefore, the area is 
. The base of the triangle is 10 (the diameter of the circle) and the height of the triangle is 5 (the radius of the circle). Therefore, the area is