A semicircle and a square. Three secants and a tangent form two triangles. What is their area proportion?
Up and down
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A semicircle and a square. Three secants and a tangent form two triangles. What is their area proportion?
A blue square is topped with a right triangle. Using line segments to the top, a green quadrilateral is constructed with at least two right angles. What is the area proportion green : blue?
An equilateral triangle inscribed in a square. What’s the proportion of the red to the blue area?
Two touching circles and two lines passing through the tangency point. What is the area proportion of the two triangles?
Two semicircles inside a rectangle. What is the proportion of the red to the green area?
A triangle, a median and another cevian. What is the proportion of the two areas?
A triangle with a 45° angle is placed inside a square as shown. What’s the area proportion of parts A and B?
Two overlapping rectangles. What is the proportion of their areas? All triangles in the diagram are right.
A circle containing two touching semicircles. What is the proportion of the circle diameter a to the line segment b?
A triangle is formed by a circle radius and an external point. It is divided by the shown chord. What’s the proportion of the angles α and β?