Answer:
The surface area of the lower rectangle is 20cm x 4cm= 80 square cm
the surface area of the two triangles is 12 square centimetres
the surface area of one of the top rectangular faces is 20×5= 100 square centimetres
the surface area of the other is 20×3= 60 square centimetres
80+12+60+100=252 square centimetres is the surface area of the polyhydron
Answer:
least common denominator is 72
8 goes into 72 9 times
9 goes into 72 8 times
12 goes into 72 6 times
Step-by-step explanation:
Answer: -11 & 9
Step-by-step explanation: Coefficients are the numbers before the variables.
Acute, Meaning less than 90 degrees.
