Rewrite the following proposition in the form if then .

1. If the angles of two phases (corresponding) are equal, then their complementary angles are equal.

2. If the diagonal of a parallelogram is equal, then the parallelogram is rectangular.

3. If two non-overlapping lines are perpendicular to a line, then the two lines are parallel to each other.

4. If the two angles are (corresponding) opposite the top angles, then the angles are equal.

5. If a triangle is a right triangle, then its two acute angles are equal.

1 If the two angles are equigonal, then their complementary angles are equal.

2 If the two diagonals of a parallelogram are equal, then the parallelogram is a rectangle.

3 If two straight lines are perpendicular to the same straight line, then the two straight lines are parallel.

4 If the two angles are opposite the apex angles, then the two angles are equal.

5 If a triangle is a right-angled triangle, then its two acute angles are surplus to each other.

1. If the two angles are equal, then their complementary angles are equal.

2. If the opposite corners of the parallelogram are equal, then this parallelogram is a rectangle.

3. If two straight lines are perpendicular to the same straight line, then the two straight lines are parallel.

4 If the two angles are opposite the apex angles, then the two angles are equal.

5. If two acute angles are in a right triangle, then they are mutually congruent.

For example, if the two corners are opposite the top angles, then the two angles are equal, so the answer is: if the two corners are split circles to the top angles, then the two angles are equal

1.(1) If the two lines are parallel, then the internal angles of the same side complement each other. (2) If the two angles are equiangial, then their complementary angles are equal.

2.Title: The two corners are opposite the top angles. Conclusion: These two angles are equal.

3.(1) True proposition. (2) True propositions. (3) True proposition. (4) True propositions. (5) False propositions. For example, a 30-degree angle and a 40-degree angle are not mutually reinforcing.

【Answer】See Analysis.

Answer Analysis] Test Question Analysis: Find out the conditions and conclusions of the original proposition to get the answer Solution: (1) If the two angles are opposite the apex angles, then the two angles are equal;

2) If two straight lines are parallel, then the isotopic angles are equal;

3) If the two angles are the co-angles of equal angles, then the two angles are equal Comments: This question mainly examines the form of writing the original proposition as conditions and conclusions, "if" is followed by the conditions of the proposition, "then" is followed by the conclusion of the conditions, the key to solving this problem is to find the corresponding conditions and conclusions, which is relatively simple

If all the angles are right angles, then they are all equal.

If a number is greater than o, then it must be positive.

If the A side +1 = 0, then there must be a number A

1. If all the angles are right angles, then they are all equal.

2. If a number is positive, then it must be greater than 0

3. If a2+1=0, then there must be a number a

1. If it is a right angle, then it is equal to 90 degrees.

2. If one is a positive number, then it must be greater than 0

3. If a number a= then a2+1=0 must be true.

(1) If the two angles are equal, then their co-angles are equal.

2) If two straight lines are perpendicular to the same straight line, then they are parallel to each other.

3) If two lines are parallel, then their bisector of the same side inner angles is perpendicular to each other.

If the two angles are coangles of equal angles, then the two angles are equal.

If both lines are perpendicular to the third line, then the two lines are parallel.

If the two rays are bisectors of the same inner angle formed by two parallel lines truncated by a third line, then the two rays are perpendicular to each other.

If the angles to the apex are equal.

The co-angles of the same angle are equal.

The complementary angles of equal angles are equal.

The isotope angles are equal, and the two straight lines are parallel.

The two straight lines are parallel and complementary to the side inner angles.

Two straight lines parallel to the same line are parallel.

Two straight lines perpendicular to the same line are parallel.

The two acute angles of a right triangle are redundant.

Congruent triangles correspond to equal sides.

A corner between the two sides corresponds to two equal triangles congruence.

Equiangular to equinometric sides.

The isosceles triangle is three lines in one.

Then there is an isosceles triangle with an internal angle of 60° which is an equilateral triangle.

1) If two lines perpendicular to the same line, then the two address lines are parallel and parallel.

2) If the two angles are internal misalignment, then the two angles are equal and equal.

Hello! If there are two straight lines perpendicular to the same straight line 1, then the two straight lines are parallel, and if there are two angles that are internal wrong angles, then the two angles are equal.

2If you have any questions, please ask.

1.If both angles are right angles, then they are equal.

If the two quantities are equal, then they can be substituted for each other.

If the last digit of an integer is 5, then the number is divisible by 5.

If the three angles are the inner angles of a triangle, then their sum is equal to 180

Hello, 1.If the inner misalignment angles are equal, then the two straight lines are parallel to 2If a figure is a parallelogram, then it is a center-symmetric figure3

If two angles are at the same angle, then their complementary angles are equal4If a triangle is a right-angled triangle, then its two acute angles are 5If two triangles are symmetrical with respect to a certain straight line, then they are congruent 6

If two triangles are congruent triangles, then their corresponding angles are equal7If the two sides of a triangle are equal, then they are opposite opposite diagonally.