A chalk drawing of a circle drawn in all four quadrants with a right angled triangle in the first quadrant on a green board - stock illustration

A green color blackboard with a pair of axes, axis denoting the four quadrants. A circle with centre, center as origin, ithe intersection of the axes. A right triangle is made with hypotenuse as radius of the circle labelled as r, the base x and the altitude or perpendicular y over a grungy textured color gradient board. The geometric figure is hand drawn in peach, yellow and orange colored chalks. The sides of the triangle are marked in small case letters or alphabets. The lines in the figure are very neatly drawn. The drawing is to the right in the frame and copyspace to the left. No people. The blackboard has a green gradient with dark corners and sides while the middle or center is in a lighter tone