Question

What is a two-dimensional representation of a three-dimensional figure?(1 point)
Responses

a square
a square

a cube
a cube

a net
a net

a rectangle
pick one i put that is correct

Answer 1

a net

Answer 2

What is the missing length of a rectangular prism where the height and width are both 9 cm and the surface area is 432 cm2 ?(1 point)
cm

Answer 3

The formula for the surface area of a rectangular prism is 2lw + 2lh + 2wh, where l is the length, w is the width, and h is the height.

Given that the width and height are both 9 cm, we can substitute these values into the formula and the given surface area of 432 cm^2:

2(9)l + 2(9)9 + 2l*9 = 432
18l + 162 + 18l = 432
36l + 162 = 432
36l = 270
l = 270 / 36
l = 7.5

Therefore, the missing length of the rectangular prism is 7.5 cm.

Answer 4

Use the image to answer the question. (Height: 13 cm. Width: 7.5 cm) Calculate the surface area of the cylinder. Give both exact and approximate answers. Round the approximate answer to the nearest hundredth. Use π=3.14 . (1 point) Exact answer: [ ]π cm^2 Approximate answer: [ ]cm^2