You are conducting a study on the health of people who have been exposed to radiation and those who have not been exposed to radiation.
Which of these methods of obtaining data should you most likely adopt and why?
A.
an observational study because it involves the pre-existing condition of the subjects
B.
an experimental study because it will give the most accurate results
C. an experimental study because results can be obtained much faster using this technique
D. a sample survey with only people who were not exposed to radiation because it involves random selection
E. a sample survey with only people who were exposed to radiation because it involves random selection

solution:

we have to construct

∠m nt ≅ ∠p qr

the steps to draw this construction are

step 1: use a compass to draw an arc from point q which intersects the side pq at point a and the side qr at point b.

step 2: draw a segment nt and use the same width of the compass to draw an arc from point n which intersects the segment nt at a point x.

step 3:

step 4: join points n and y using a straightedge.

step 3:

option (d).maintaining the same width of the compass as ab, draw an arc from point x such that it intersects the arc drawn from n in a point y.

to draw   congruent angles , 1. width of compasses while drawing two angles should be same i.e from point at which angle has to be drawn, 2.the distance between the two points where the compass intersects the two sides should be same while drawing any two congruent angles.

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step-by-step explanation:

nndncnd cnn

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