15
Chat with our AI personalities
A decagon has ten sides, a quadrilateral has four, an octagon has eight, and a triangle has three. So in 1 decagon, 5 quadrilaterals, 5 octagons, and 5 triangles there are 1*10 + 5*4 + 5*8 + 5*3 = 10 + 20 + 40 + 15 = 85 sides altogether.
They add up to (1*10)+(4*4)+(3*5) = 41 sides altogether
How about a rectangle, parallelogram or a kite
An octagon has 8 sides and a pentagon has 5 sides so it follows that 8+5 = 13 sides
There are: (5*6)+(3*5)+(5*3) = 60 sides