There is no right angle

Diagonal lines intersect not to form a right angle. Parallelogram 4. I have four equal corners.

Diagonal lines intersect to form direct names. I have two groups of parallel and equal opposite sides.

There are four equal angles.

Diagonal lines intersect not to form a right angle. = square

Rectangle 6. I have four equal sides.

But there is no right angle. = Diamond 7. I only have one set of parallel sides = trapezoid.

Reference: self

1.2 plus 65438+4+2 plus 65438+7+1 plus 65438+4 = 2+2+1+65438+4+65438+7+05. =6 2. 1 and 13 5+ 12+7 and138 =1+12+7+135+/kloc-0. 24 in 60 =15 [6] = [10] 4,60 in 60 is the denominator. 15 branch 6, 15 is the denominator. 60 divided by 15 is 4, the molecule should be divided by 4 at the same time, and 24 divided by 4 is 6. 24 is a molecule, which is 6 times of 65438+4/00, and 6 times of 65438+4/00 is also the denominator of 24/60. 60 divided by 6 is10,28/16 = [140], and 80 = 7.

1.2 plus 65438+4+2 plus 65438+7+1 plus 65438+4 = 2+2+1+65438+4+65438+7+05. =6 2. 1 and 13 5+ 12+7 and138 =1+12+7+135+/kloc-0. The four corners of a rectangle are all 90 degrees, and there are two groups of parallel opposite sides, so the rectangle is correct. (Note: a square is also a rectangle) 6. All diamonds should not have right angles, but should have four equal sides, so the answer is a diamond. 7. A group consisting of only four squares with parallel opposite sides is called a trapezoid. 24 in 60 =15 [6] = [10] 4,60 in 60 is the denominator. 15 branch 6, 15 is the denominator. 60 divided by 15 is 4, the molecule should be divided by 4 at the same time, and 24 divided by 4 is 6. 24 is a numerator, which is 6 times of 65438+4/00, and 6 times of 65438+4/00 is also the denominator of 24/60. 60 divided by 6 is10,28/16 = [140], and 80=7/4.