What is Shape Corners?

A geometry counting game: a shape is drawn and you choose its number of corners (vertices) from a few numeric options, building a streak as you go.

Everything from the circle (0 corners) and triangle (3) up to the nonagon (9) and decagon (10), plus the quadrilateral family · rhombus, trapezoid, parallelogram, kite · and compound outlines like the star, cross, arrow, crescent and semicircle.

How many corners does the star have?

Ten. The five-pointed star is drawn with five outer points and five inner corners, and the game counts every corner where two sides meet · so counting all ten is the right answer.

How does it get harder?

Higher difficulty brings in shapes with more corners that need careful counting, and adds more numeric choices sitting closer to the right answer.

How does my progress save?

Your best streak is stored locally in your browser. Sign in to sync it across devices.

Shape Corners · 数一数角 · 中文

One shape appears · a triangle, hexagon, star or arrow · and you pick how many corners it has. Counting and geometry, one tap at a time

A shape is drawn and you pick how many corners it has. JavaScript required.

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