Is every diameter of a circle also a chord?

Investigate:

Use strips and fasteners to make a triangle and a quadrilateral.

Try to push inward at any one vertex of the triangle. Do the same to the quadrilateral.

Is the triangle distorted? Is the quadrilateral distorted? Is the triangle rigid?

Why is it that structures like electric towers make use of triangular shapes and not quadrilaterals?

From the figure, identify:

(a) the centre of the circle

(b) three radii

(c) a diameter

(d) a chord

(e) two-points in the interior

(f) a point in the exterior

(g) a sector

(h) a segment

Is every chord of a circle also a diameter?

Draw any circle and mark

(a) its centre

(b) a radius

(c) a diameter

(d) a sector

(e) a segment

(f) a point in its interior

(g) a point in its exterior

(h) an arc