Estimate how many tennis balls can fit into a small room

a tennis ball has a diameter of about 2.5 inches

 so volume of a tennis ball is: 4/3 x pi x r^3 = 8.2 cubic inches ( estimating you could say 8 cubic inches

 1 cubic foot = 1728 cubic inches

 so you could fit 1728/8 = 216 tennis balls in a cubic foot.( estimated)

 you would then need to calculate the volume of the room

lets say a small room is 9 foo by 9 foot by 8 feet high

 9 x 9 x 8 = 648 square feet

 now multiply the 216 by the square feet of the room

216 * 648 = 139,968tennis balls

 now because they are round, there will be empty space around them

 so you could estimate about 139,000 tennis balls would fit I a 9 x 9 room that is 8 feet high.

 You didn't give the dimensions of the room, but this gives you the idea of how to estimate

true? is that what you're asking or do you mean something else?

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.