Tutors Answer Your Questions about Surface-area (FREE)
Question 1117016: I have to answer this question for an assignment practice but was unsure of how to do it. If possible could you tell me the correct answer BUT say why it is true? (so I can understand better)
If you are looking at a dodecahedron, Which of these can be created by a planar cross section?
MORE THAN ONE ANSWER MAY BE CORRECT!
Options:
Isosceles triangle
Scalene triangle
Rectangle
trapezoid
Dodecagon
Equilateral triangle
Pentagon
Concave polygon
Click here to see answer by ikleyn(52781)   |
Question 1117017: Compare two similar cones. The circular base of the first cone has a radius of 7cm. The second cone has a circular base with a radius of 21cm. Calculate the ratio of the radius of the second cone to the ratio of the old cone.
Ratio:____
Side note: I am unsure of how to do this problem, I though tI would do 21/7 but that didn't seem right
Click here to see answer by Alan3354(69443)  |
Question 1117015: Thank you in advance for help:)
A jewelry box has the shape of a prism with a regular hexagonal base of 196.65. The sides of the hexagonal base are ALL 8.70 inches. If the height of the box is 16.07in, what would the surface area be of the wood used to make the jewelry box?
Options:
1237.79
1232.15
1242.93
1223.47
None of the above
Click here to see answer by Theo(13342)  |
Question 1117165: A rectangular garden, measuring 20m by 15 m, has a uniform strip removed from the edge of one length and the edge of one width to make a concrete walkway. If the area of the remaining garden is 204m squared , what is the width of the walkway
Click here to see answer by ptaylor(2198)  |
Question 1117755: A circular sector AOB, centre O and radius 8 cm, contains an angle of  radians at the centre. The straight edges OA and OB are joined to form a right circular cone. Find the exact value of the curved surface area of the cone.
Click here to see answer by josmiceli(19441)  |
Question 1117862: This ornate box is in the shape of a regular hexagon. The length of each edge is nine and a half centimetres. The distance across the box from the middle of one edge to the middle of the opposite edge is 17cm. What is the area (to two decimal places) of the base of the box in square centimetres?
Click here to see answer by josgarithmetic(39617) |
Question 1117862: This ornate box is in the shape of a regular hexagon. The length of each edge is nine and a half centimetres. The distance across the box from the middle of one edge to the middle of the opposite edge is 17cm. What is the area (to two decimal places) of the base of the box in square centimetres?
Click here to see answer by greenestamps(13200)  |
Question 1117863: This arrow can be thought of as two touching parallelograms (the arrow head) joined to an irregular pentagon. What is the area of the pentagon if the total arrow area is 1000cm². The top and bottom edges of the arrow are 12cm in length and are 40cm apart. Give your answer in square centimetres.
Click here to see answer by addingup(3677)  |
Question 1118632: The base of an isosceles triangle is 2a cm in length and its perpendicular height is h cm. On each of the three sides of the triangle, a square is constructed. Show that the area of the complete figure is 6a^2 +ah+2h^2 cm^2.
Click here to see answer by Boreal(15235)  |
Question 1118629: A farmer has 800 metres of wire with which to fence 3 rectangular paddocks side by side. The width of the paddocks is x metres and the sum of their lengths is y metres.
a)show that the total area of the paddocks is given by A= 400x-2x^2
b) find the greatest area that can be enclosed
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 1119142: Suppose Solid A and Solid B are similar. Solid A has an edge length of 18 cm, and the corresponding edge in Solid B is 12 cm. If the surface area of Solid A is 1836 cm2, what is the surface area of Solid B in square centimeters?
Click here to see answer by ikleyn(52781) |
Question 1119810: An architect is designing a shopping mall and built a sale model replica of the mall. On the model, a circular fountain
is 20 inches tall and 22.5 inches in diameter. If the actual fountain is to be 8 feet tall, what is the diameter?
PLEASE SHOE SOLUTION.
Thank you.
Click here to see answer by ikleyn(52781) |
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