The USGBC reports that from 2015 to 2018, LEED-certified buildings have saved $1.2 billion in energy savings and $715.2 million in building maintenance costs. If this trend continues at the same rate over the next 15 years, what will be the savings in building maintenance costs between 2018 to 2033? A. $3.576 billion
B. $6.000 billion
C. $10.728 billion
D. $18.000 billion

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.