Mean = sum(X)/n = 15cm/5 = 3cm
Let x be the length of one of the congruent sides, then the three sides are x, x, 3x. Perimeter = x + x + 3x = 5x = 75cm => x = 15cm Thus the three sides are 15cm, 15cm, 45cm.
The perimeter of a full circle (circumference) is "pi" times the diameter. So the perimeter of a semi-circle will be half that; Perimeter = (pi/2) x (diameter).
Volume = 2cm x 2 cm x 2 cm = 8 cm^(3).
It is 8 cubic cm.
It is: 2+15+2+15 = 34cm
It depends what units you use for each side ! A 1cm x 15cm rectangle has a perimeter of 16cm. So does a 2cm x 4cm one ! If you start using millimetres, there are many more possibilities !
Mean = sum(X)/n = 15cm/5 = 3cm
Perimeter is the total of all the sides. Let's assume your part-question relates to a rectangle. Four sides: 2 x 8cm and 2 x 15cm. I'm sure you can work it out from there...
8cm (4 x 2 = 8)
Let x be the length of one of the congruent sides, then the three sides are x, x, 3x. Perimeter = x + x + 3x = 5x = 75cm => x = 15cm Thus the three sides are 15cm, 15cm, 45cm.
Since all four sides are equal in a square, a square with an area of 4cm2 must be 2cm on each side. Therefore, the perimeter is 2cm x 4 = 8cm.
90cm (six sides x 15 = 6 x 15 = 90)
The perimeter of a full circle (circumference) is "pi" times the diameter. So the perimeter of a semi-circle will be half that; Perimeter = (pi/2) x (diameter).
A 6cm X 2cm shape is a rectangle. Two sides are 6cm, and the other two are 2cm. Therefore, 6+6 + 2+2 = 16cm.
Oh, dude, it's like you're trying to make me do math here. Alright, so the volume of a cube is just the length of one side cubed. In this case, it's 2cm x 2cm x 2cm, which equals 8 cubic centimeters. So, yeah, that's the volume of your little cube.
Volume = 2cm x 2 cm x 2 cm = 8 cm^(3).