Cracking The SAT Premium

AB = BC = AC A right triangle is a triangle in which one of the angles is a right angle (90 de ...

AB = BC The perimeter of a triangle is the sum of the lengths of its sides. perimeter = 4 + 6 + 6 ...

Try a question testing some of these concepts: 3. The regular hexagon shown above is divided into six congrue ...

Let’s see an example: 11. In the triangle above, sin x = 0.8 and cos x = 0.6. What is the area of the ...

Similarly, cosine is , so if cos x = 0.6, then . Multiply both sides by 10 to determine the ...

B) C) D) Here’s How to Crack It Start by drawing triangle ABC. Next, label what you can. You don’t know ...

Therefore, AC = 5, and tan ABC = , which is (B). Special Right Triangles Both of the previous questio ...

A 3-4-5 triangle may be hiding, disguised as 6-8-10 or 18-24-30. It’s all the same ratio, though, so be on ...

Learn these symbols and keep an eye out for them! Similar Triangles Similar triangles have the same shape, bu ...

In the figure above, ΔABC is similar to ΔXYZ. What is the value of cos A? A) B) C) D) 2 Here’s How to Crack ...

You’ll be given this information in your test booklet, so don’t stress over memorizing these formulas. ...

won’t multiply π out in circle problems. Because the answer choices will usually be in terms of π (6π instead of ...

The circle defined by the equation (x − 4)^2 + (y – 4)^2 = 25 has its center at point (4, 4) and inclu ...

Note that these relationships are all proportions. Arcs and sectors are proportional to the circumference an ...

Here are some rules you’ll need to know about rectangles and squares: The perimeter of a rectangle i ...

perimeter = 4(3) = 12 area = 3^2 = 9 In rectangles and squares all angles are 90-degree angles. It c ...

In this polygon, a + b + c = 180 degrees; so does d + e + f. That means that the sum of ...

the polygon into triangles. Let’s try an example: 12. Note: Figure not drawn to scale. In parallelogram ABCD a ...

shape (pun entirely intended)! Let’s look at an example: 15.A sphere has a volume of 36π. What is ...

Because 45 of its 58 Math questions are multiple-choice, you can afford to approximate numbers like π, , and (3+, 1. ...