1 You can spell three rectangles, ① with a right-angled trapezoid and a small triangle, ② with a right-angled trapezoid, a small triangle and a square, ③ with a right-angled trapezoid, a small triangle and two large triangles.

2. Can spell out four isosceles right triangles, ① with a right trapezoid and a small triangle, ② with a right trapezoid, a small triangle and a big triangle, ③ with a right trapezoid, a square, a small triangle and a middle triangle, and ④ with two big triangles.

3, can spell out two right-angled trapezoid, ① with a right-angled trapezoid and a square, ② with a right-angled trapezoid, a small triangle and two large triangles.