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Amrita B.

State Theorem $1-2$ using the phrase one and only one.

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Evan S.

A plane can be named by three or more noncollinear points it contains. In Chapter 12 you will study pyramids like the one shown at the right below. Name five planes that contain sides of the pyramid shown.

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Classify each statement as true or false. $D$ is on line $h$.

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Make a sketch showing four coplanar points such that three, but not four, of them are collinear.

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Hey, guys, we're here to talk about circles and tangents. So there are some special relationships between circles and tangent lines to the circles. I'm here to talk about two of them. One is if you have a circle and you have a tangent line, remember what it used to be. Tangent. A tangent line is, uh ah line that's in the same plane as the circle and intersects the circle at exactly one point. This is known as the tangent line, and this point is known as the point of Tange INSEE. Okay, okay. So here the two therms involved one is if you have a circle and you have a line tangent to the circle, then the radius. Okay, The specific radius from the center circle to that point of agency is automatically gonna be perpendicular to the tangent line. That's very special, because now we can do is we could draw this line and no, we have a right triangle, and you could see there'll be a lot of practical uses unknowing when we have a right angle. So that's one special here. The other one is if you have a circle and an exterior point and Then you have to tangent segments from the same point. So let me draw that a little better. So what I mean by that is is this tangent segment and this tangent segment are tangent from the same point that what happens is those two tangent segments are congruent So if you have to external tangents emanating from the same point, those segments will be congruent. And to recap if you have a tangent to a circle in the radius that connects the center to that point of agency will be perpendicular to the line or segment that has changed to the circle. So those two quick tangent line the're ums. We'll see you soon with some examples and how to use this.

Parallel and Perpendicular lines

Deductive Reasoning

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Geometry Basics

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