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About this game
Name the triangle: a free Grade 5 math game for ages 10-11. Kids read the side lengths and name the triangle: equilateral, isosceles or scalene. Each round brings 10 fresh questions with new numbers; instructions are read aloud and every answer is checked.
Triangles in a math book usually come drawn, but this game gives only numbers. Name the triangle shows three side lengths per card, such as 6 cm, 9 cm and 6 cm, and three names to choose from: equilateral, isosceles and scalene. The list is short, twelve triangles, so one can come back in the same round of ten. Your child taps a name in this Grade 5 game, and every tap is checked.
Naming by sides is a counting job. The hint gives the whole rule: three equal sides make an equilateral triangle, exactly two make it isosceles, and none makes it scalene. The twelve triangles split evenly, four of each kind, with sides from 3 to 9 cm, so no name is a safe guess. Without a picture, the numbers are the only evidence.
Position fools the eye. In 6 cm, 9 cm and 6 cm the two equal sides sit apart in the list, and Scalene gets tapped because no neighbors match. Ask, "Which length shows up twice, anywhere in the list?" Pointing at each 6 in turn helps. Close with, "You compared every side, not just the neighbors."