The pyramid is shown in the diagram below.
The pyramid is built from four congruent triangles and one square as the base
We have the side of the square, so the area is = 10×10 = 100
We need the height of the triangle to work out its area. We can find out by using the height of the pyramid and half of the length of the side of the square.
Using the Pythagoras rule
Height of triangle =

Area of one triangle = 1/2×10×12=60
Surface area of the pyramid = 100 + (4×60) = 340 square inches
Answer:
height is =area dived by base
Step-by-step explanation:
156 divide 13 is 12
so the answer of height is 12.......hope u understand dear
74.40/3 friends= 24.80 for each friend. Simply division, easy to do on a calculator if you are allowed one.
Answer:
the answer is 7/9
Step-by-step explanation: