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ACT Math: Plane Geometry Drill 4, Problem 1. What is the radius of the sphere?

ACT Math: Plane Geometry Drill 4, Problem 5. What is the height of the prism?

ACT Math: Plane Geometry Drill 5, Problem 5. How much material do you need to cover the entire tent?

This video explains the vertical angle theorem. Learn about supplementary angles, adjacent angles, and linear pairs, plus bungee jumping. Intersect...

FYI: cats don't like to get wet. Okay, so that fact won't be relevant every time you solve trig equations, but it happens to be this time.

We inscribed some angles on the walls of our office, but our boss got mad, so we made this video instead.

Los cubos de hielo no son ruidosos generalmente...pero tienen un volumen de tipo diferente. Este video te enseñará cómo encontrar el volumen de...

Volume is crucial to our lives. It determines the amount of food we eat, the amount of fluid we drink, and hydraulics, just to to name a few. One o...

Haven't you always wondered how much cardboard it takes to encase a trunk warmer for your pet elephant?

Time to learn about the area of a sector. And no, that's not the sector's bedroom with a bumper sticker on the door that reads, "GO AWAY."

It's super useful to be able to find the distance around stuff. Like when you’re being pursued by authorities while running around the base of an...

SAT Math 1.1 Geometry and Measurement. What is the circumference of the circle?

ACT Math: Plane Geometry Drill 5, Problem 3. What is the measure of Angle GHJ?

ACT Math: Coordinate Geometry Drill 5, Problem 2. Which of these three lines are parallel?

SAT Math 5.2 Geometry and Measurement

ACT Math: Coordinate Geometry Drill 1, Problem 1. Which inequality is expressed by the number line?

ACT Math: Coordinate Geometry Drill 2, Problem 4. What is the equation for the circle in the video?

ACT Math: Coordinate Geometry Drill 2, Problem 5. What is the origin of the circle?

CAHSEE Math Mathematical Reasoning: Drill 2, Problem 5. Which of the following conclusions can be drawn based on the above information?

Mathematical Reasoning Drill 5, Problem 1. Which of the following could be the number of pieces the lasagna was cut into?

If you already know what a conditional statement is, then you're smarter than you look. And boy do you look smart.

To prove lines are parallel, you need a third line. We at Shmoop (and the rest of the world) call it a transversal.

SAT Math 2.1 Geometry and Measurement. What is the measure of angle z in terms of x and y?

SAT Math 5.2 Geometry and Measurement

Curious to find out what angle these guys are playing? Check out this video. You’ll have angles coming out of the wazoo.

SAT Math 4.3 Geometry and Measurement

“Polygon” - it’s not just something we say when our pet parrot escapes through the kitchen window. Curious to find out what angle these guys...

Rectangles just love to have perimeters. And we just love to measure them.

SAT Math 4.1 Geometry and Measurement

CAHSEE Math: Mathematical Reasoning Drill 3, Problem 4. Which of the expressions gives the best estimate as to the length of this quadrilateral's p...

Verifying trig identities is important, especially when you're about to let one of them into the country—which is why they should keep their pass...

Sine is the opposite over the hypotenuse; cosine is the adjacent over the hypotenuse; and tangent is the opposite side over the adjacent side....

ACT Math Trigonometry Drill 1, Problem 2. Can you find the tangent?

Bien, tú no eres el único que cae completamente en el aburrimiento por un rato. Dos figuras geométricas dimensionales también. ¿Cómo ellos pu...

SAT Math 11.2 Geometry and Measurement

If you were looking for the trailer for the new Michael Bay movie, you've got the wrong number. Transformations are rotations, reflections, and tra...

This video covers the different types of triangle. What makes a triangle isosceles, scalene, or equilateral? What about the different kinds of angl...

Sine is the opposite over the hypotenuse; cosine is the adjacent over the hypotenuse; and tangent is the opposite side over the adjacent side....

Someday you might be a big, fancy defense lawyer, and you'll have to prove that your client's triangle was congruent to the triangle in question. W...

We’ve got a problem. Actually, we’ve got a ton of them. Fortunately, they’re only geometric word problems, which really aren’t so bad. We�...

How do you figure out how long you have before the Galapagos Zombie Tortoises eat you? By using math, of course. If you can't solve this problem, w...

Simple steps to solving geometry word problems. If only the problems themselves were this simple...