Answer:
Step-by-step explanation:
Answer:
140 inches
Step-by-step explanation:
one decagon has 10 sides
14*10= 140
Answer:
4
Step-by-step explanation:
Lateral= perimeter of base x height = 20 x 15 = 300cm^3
total= 20 x 15= 300 / 2 = 150. 20 x 30= 600. 15 x 30= 450. 25 x 30 = 750. 15 x 20= 300 = 2250
Answer:
158cm squared
Step-by-step explanation:
Area of triangle=1/2×b×h
Area of rectangular base of prism=l×w
Area of 2 rectangular sides of the prism=l×w
So Total surface area= 1/2×6×5×2)+(8×6)+(8×5×2)=158cm squared