Pyramide-shaped gift boxes have square bases that measure 5 inches on each side.The slant height is 6.5 inches.How much cardboard is used to make each box?
2. using the slanted 6.5 =1/2base , therefore 5/2=2.5 inches
3. then use pythagoras.... c=6.5, a=2.5 c^2=a^2 + b^2 (do this urself)
4. when u find what b is... that's the height of one of the triangle base= 2.5 (look at step 2 if u don't understand this bit) height=b (refer to step 3)
5. then work out the area of 1 triangle using that... 6. then have (the answer u work out in step 5 ) multiply 4 this will give u the area for the all of the 4 triangles...
7. Then add together the square based area in step 1..(25) to the 4 triangular, area faces (i.e from step 6) - the total will be ur answer for the amount of cardboard!!