SAT Math : Solid Geometry

Study concepts, example questions & explanations for SAT Math

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Example Questions

Example Question #1 : How To Find The Volume Of A Cone

Find the volume of a cone with radius 3 and height 5.

Possible Answers:

Correct answer:

Explanation:

To solve, simply use the formula for the volume of a cone. Thus,

To remember the formula for volume of a cone, it helps to break it up into it's base and height. The base is a circle and the height is just h. Now, just multiplying those two together would give you the formula of a cylinder (see problem 3 in this set). So, our formula is going to have to be just a portion of that. Similarly to volume of a pyramid, that fraction is one third.

Example Question #871 : Sat Mathematics

Find the area of a cone whose radius is 4 and height is 3.

Possible Answers:

Correct answer:

Explanation:

To solve, simply use the formula for the area of a cone. Thus,

Example Question #4 : How To Find The Volume Of A Cone

The volume of a right circular cone is . If the cone's height is equal to its radius, what is the radius of the cone? 

Possible Answers:

Correct answer:

Explanation:

The volume of a right circular cone with radius  and height  is given by:

Since the height of this cone is equal to its radius, we can say:

Now, we can substitute our given volume into the equation and solve for our radius.

Example Question #1 : How To Find The Volume Of A Cone

Cone

The above is a right circular cone. Give its volume.

Possible Answers:

Correct answer:

Explanation:

The volume of a right circular cone  can be calculated from its height  and the radius  of its base using the formula

.

We are given , but not .

, , and the slant height  of a right circular cone are related by the Pythagorean Theorem:

Setting  and , substitute and solve for :

Taking the square root of both sides and simplifying the radical:

Now, substitute for  and  and evaluate:

Example Question #182 : Solid Geometry

Cone

The above is a right circular cone. Give its volume.

Possible Answers:

Correct answer:

Explanation:

The volume of a right circular cone  can be calculated from its height  and the radius  of its base using the formula

.

 and , so substitute and evaluate:

 

Example Question #183 : Solid Geometry

Cone

In terms of , express the volume  of the above right circular cone.

Possible Answers:

Correct answer:

Explanation:

The volume  of a cone can be calculated from its height  and the radius  of its base using the formula

The slant height  is shown in the diagram to be 24. By the Pythagorean Theorem, 

Setting  and solving for :

Substituting in the volume formula for :

.

 

Example Question #181 : Solid Geometry

Cone

In terms of , express the volume  of the provided right circular cone.

Possible Answers:

Correct answer:

Explanation:

The volume  of a cone can be calculated from its height  and the radius  of its base using the formula

The height of the cone is shown to be equal to 20, so substituting accordingly:

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