# Geometry (check)

Mario’s company makes unusually shaped imitation gemstones. One gemstone had 12 faces and 10 vertices. How many edges did the gemstone have?

A. 23 edges
B. 22 edges
C. 25 edges
D. 20 edges****

1. 👍 3
2. 👎 1
3. 👁 3,583
1. You are correct, it is D

F = 12, V = 10
V - E + F = 2
10 - E + 12 = 2
-E + 22 = 2
-E = -20
E = 20

1. 👍 4
2. 👎 1
2. Thank you

1. 👍 2
2. 👎 0
3. thanks for the help

1. 👍 1
2. 👎 0

## Similar Questions

1. ### Math

You want to wrap a gift shaped like the regular triangular prism shown. How many square inches of wrapping paper do you need to completely cover the​ prism? In a triangular prism, the front and back faces are triangles and the

2. ### Language Arts

The term parody is a technical word used in the field of drama. Which word in the following sentence provides context to help you find the meaning of the word parody? (1 point) The play we watched was a parody of Frankenstein by

3. ### Math

Consider the right rectangular prism shown. The figure shows a right rectangular prism whose dimensions are 8.5 centimeters, 2.25 centimeters, and 5.75 centimeters ​List the numbers of faces, edges, and vertices of the

4. ### math

a polyhedron has 36 edges and 21 faces, how many vertices does it have? thank you

1. ### Math

A company makes concrete bricks that are shaped like rectangular prisms. Each brick is 6 inches long, 3 inches wide, and 2 inches tall. How much concrete will they need to make 1800 bricks?

2. ### Math

which shape has 5 faces 5 vertices and 8 edges? triangular Pyramid** Rectangular pyramid Pentagonal pyramid

3. ### algebra

kristyn is 4 yrs younger than mario.three years from now she will be two thirds as old as mario. find the present age

4. ### math

Mario rolled a number cube labeled 1-6 sixty times. In what percent of the rolls did Mario roll a number less than 4?a.5%,b.33%,c.50%,d.55% # #of x rolled 1 16 2 12 33/60 x/100 3 5 3300/60=55? 4 8 5 12 6 7

A cube has 8 vertices, 12 edges, and 6 square faces. A soccer ball (also known as a buckyball or truncated icosahedron) has 12 pentagonal faces and 20 hexagonal faces. How many vertices and how many edges does a soccer ball have?

2. ### math

kristyn is 4 years younger than mario. 3 years from now, she will be two thirds as old as mario. find their present age.

3. ### Algebra

Mario is 16 years older than his sister Mercedes. Together, their ages total 36 years. How old is Mercedes? Mercedes is 20 years old. let x = Mario's age y = Mercedes' age ====================== Mario is 16 years older than

4. ### Geometry

7.Given the vertices of ∆ABC are A (2,-5), B (-4,6) and C (3,1), find the vertices following each of the transformations FROM THE ORIGINAL vertices: d. Rx = 3 e. T f. r(90◦, o) I did already post this, but I forgot to bookmark