Inscribed and Circumscribed Circle and Triangles

The centre of the circumscribed circle of a right triangle is the midpoint of the ______________________.

The centre of the inscribed circle is the intersection point of the _____________________.

• angle bisectors

• perpendicular bisectors of the sides.

In an isosceles triangle, the height corresponding to the base is also the _________________________ of the base.

THe perpendicular bisector of any chord of the circle will pass therough the centre of the circle.

• false

• true

If we denote the radius of the inscribed circle of a triangle with "r" and half of its perimeter "s", then the area can be expressed as:

• rs/2

• rs

The centre of the inscribed circle of an obtuse triangle is

• outside the triangle.

• inside the triangle.

• on one of the sides of the triangle.

In a triangle, an interior angle and the corresponding exterior angle are _________________ angles.