The sat skill exam 10 pptx

■ In a square, diagonals have both the same length

and intersect at 90-degree angles.

Solid Figures, Perimeter,

and Area

The SAT will give you several geometrical formulas.

These formulas will be listed and explained in this sec￾tion. It is important that you be able to recognize the

figures by their names and to understand when to use

which formulas. Don’t worry. You do not have to mem￾orize these formulas. You will find them at the begin￾ning of each math section on the SAT.

To begin, it is necessary to explain five kinds of

measurement:

1. Perimeter. The perimeter of an object is simply

the sum of all of its sides.

2. Area. Area is the space inside of the lines defin￾ing the shape.

3. Volume. Volume is a measurement of a three￾dimensional object such as a cube or a rectangu￾lar solid. An easy way to envision volume is to

think about filling an object with water. The vol￾ume measures how much water can fit inside.

4. Surface Area. The surface area of an object meas￾ures the area of each of its faces. The total surface

area of a rectangular solid is the double the sum

of the areas of the three faces. For a cube, simply

multiply the surface area of one of its sides by 6.

5. Circumference. Circumference is the measure of

the distance around a circle.

Circumference

4

4

Surface area of front side = 16

Therefore, the surface area

of the cube = 16 6 = 96.

= Area

6

7

4

10

Perimeter = 6 + 7 + 4 + 10 = 27

B

C

A

D

AC = DB

and

AC DB

–THE SAT MATH SECTION–

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