SAT Subject Test Mathematics Level 1

Similar Figures

The area ratio between similar figures is the square of the side ratio.

Three Special Triangle Types

Pythagorean Theorem

For all right triangles, (leg 1 )^2 + (leg 2 )^2 = (hypotenuse)^2

Four Special Right Triangles

2. Exterior angle   equals  sum of  remote  interior    angles.

3. Exterior angles  add up  to  360°.

4.

Each    side    is  greater than    the difference  and less    than    the sum of

the other   two sides.

5.

1. Isosceles:   Two equal   sides   and two equal   angles.

Equilateral:    Three   equal   sides   and three   60° angles. If  the length

of  one side    is  s,  then

2.

3. Right:   One right   angle.  You can use the legs    to  find    the area:

1. The  3-4-5   Triangle