Let's do this question, because you are this is a square we are an issue intersect at all, and I'm
going to be OK.
You is watching the video.
Give it a try and then let's do it together.
All right.
We are back, but we have over here Squire P Q r us and the diagonal Spearin Askew are intersecting
at all.
Now, the angle over here and B or Q is what we need to find.
And we know that diagonals of a square are perpendicular bicyclers of each other.
Therefore, for this angle over here is a 90 degree angle.
Right.
Therefore the correct answer is option it.
All right, let's do the next question.
Construct a unique problem.
The minimum number of measurements required is so how many measurements do you need to construct a parallelogram,
give it a thought and then let's do it together.
All right.
Let's do it together.
You need a minimum of three measurements.
That is two not parallel sides and one angle to construct a program.
For example, if you have two non parallel sides giving us A and B, and you know that one angle is
equal to, say, 60 degrees, then you're able to construct it.
For example, you can select E over here, then you draw a line at this point at sixty degrees and you
cut off A measurement of B over here using your compass.
Now you construct this parallel line through this point parallel to this line and you measure out over
here.
And you get a point over here and you join these two together in this way, you are able to construct
a program, but you need a minimum of three measurements to construct this parallelogram.