A circle constructed through three points

Test whether three given points are collinear

A vertical parabola constructed through three points

Construct an arc through three points.

Select the first of the three possibly collinear points...

Select the second of the three possibly collinear points...

Select the last of the three possibly collinear points...

It's like a combination lock, like a bike lock.

Lock

Lock.

An angle defined by three points

Construct a conic arc with given center through three points.

Construct a Bézier quadratic given its three control points.

Construct a Rational Bézier cubic given its four control points.

Toggle lock

Locking

ScrollLock

Num Lock

Number Lock

Scroll Lock

Lock and Key

Session locking error

Unlock Files

Caps Lock

I forgot to lock the barn.

Did you lock the doors?

Select the first of the three starting points of the generic affinity...

Select the second of the three starting points of the generic affinity...

Select the third of the three starting points of the generic affinity...

Select the first of the three end points of the generic affinity...

Select the second of the three end points of the generic affinity...

Select the third of the three end points of the generic affinity...

Lock myself up.

No padlock on this one...

Key Rattles In Lock

I've got a good lock on my door.

Domi's brother, who he got to write the algorithm for calculating the center of the circle with three points given.

or What's this Num Lock key for? You know, that thing?

Failed to process item...

Lock Away All Other Items

Lock Away Current Set of Items

A lock key has been activated

start with plasma unlocked for configuring

Lock the leveling screws in place

You may have heard about the Kryptonite lock brouhaha, where a blogger talked about how you hack or break into a Kryptonite lock using a ballpoint pen, and it spread all over.