A home builder wants to decorate the post at the bottom of a stairway. One way to do this is to glue a square-based pyramid to the top of the post. The pyramid is made from a single, folded sheet of copper. The square is 10 inches on a side, and the triangular sides have a central height of 6 inches.

How many square inches of copper sheet are needed to make on pyramid?

We have been given net of a pyramid. We are asked to find the total surface area of the pyramid.

The surface area of the pyramid will be area of base plus area of 4 triangular sides.

We have been given that base of pyramid is square, so area of base will be square of base side.

Let us find area of one triangular side.

Now we will multiply area of one triangular face by 4 to find area of 4 triangular faces.

Total surface area of pyramid would be area of base plus area of 4 triangular faces.

Therefore, 220 square inches of copper sheet are needed to make one pyramid.

ruth is 6 years old

step-by-step explanation:

6 + 24 = 30,   so 6/30 = .2  

if you do 1/5 it also equals .2, so that is the answer.

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.