D. 6 meters. If you add 7 meters to that, it becomes 13 meters for all sides. 13^2=169m^2. So, 6 meters was the original length.
A flat three dimensional solid like a cube, a prism or a pyramid. When you cut out the "net", fold it and glue it together you can see what the three dimensional shape looks like. (It can be used in math)Draw a net of the polyhedron. Calculate the area of each face. Add up the area of all the faces.
Answer:
14.5
Step-by-step explanation:
9y+7=2y+98
9y-2y=98-7
7y=91 /:7
y=13
(9y+7)°=(9·13+7)°=(117+7)°=124°