Urgent need for the first year of mathematics next calculation geometry application solution

You look for it in the answers I answered.

Solution: Because ab is parallel to cd (known).

Therefore, Agf = EMD (two straight lines are parallel, the isotope angle is equal) because GH bisects AGF, MN bisects EMD (known), so hgf = AGF, GMN== EMD ( angle bisector defines Biyi )

hgf=, gmn( properties of the equation )

Well, I didn't see a picture just now, and I still don't understand which question is 0 0

The two straight lines are parallel and complement each other with the inner angles of the same side.

Then the angle bisector divides the two complementary angles, that is, the two complementary angles are each taken half, and they must be mutually recurrent, and in a triangle, the two angles are mutually reinforcing, then the third pure equilibrium angle must be 90 degrees different, of course, perpendicular.

If you still don't understand, take a look at the following formula:

a+b=180

Divide both sides of the equation by 2.

That is to say: A and B complement each other, and the horns they get by taking half of each must be more than each other.

Proof is that the sum of the internal angles of the two parallel lines is 180 degrees, and the sum of the angles composed of the lines intersecting the parallel lines of the same internal angles is 90 degrees, so the angle of the intersection of the angular bisector is 90 degrees, that is, the angular bisector lines are straight to each other.

You have sorted it out since your socks, and it is this core that prevents you from thinking about changing your way.

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

The sum of the two corners is 180

Again, the bisector of the two corners.

If the two parts are equal to each other, then it is proved that the two bottom angles of the vertical triangle are 1 2 180 = 90°

It is necessary to prove that the angle between the two vertical line segments is 180-90=90°, and the two straight lines are vertical.

Tuna? Because the two straight lines are parallel, the same side inner angle complements the pin state filial piety, and because of the bisector of the two angles, so 2 times the angle (the angle in the upper straight line) + 2 times the other angle (the angle in the lower line) = 180, so 2 times (one angle + another angle) = 180, so the sum of the two angles = 90, so the other angle in the three-loss draft angle of these two corners is equal to 180-90 = 90, so.

<> structure squared and shouted that the resistance to large infiltration is to do rolling balance.

Because of OC AB

So boc 90°

Because 1 63°

So 2 90°-63° 27°

Because OC divides the nuclear rock doe equally

So the circle 3 digs 2 27°

So 3=27°