$$\left(\frac{x_2+x_1}{2},\ \frac{y_2+y_1}{2}\right)$$

$$d=\sqrt[]{\left(x_2-x_1\right)^2+\left(y_2-y_1\right)^2}$$

Given the diagram and statement below, which lines can you prove parallel and why? $$\angle2\cong\angle8$$

$$a\ \ \parallel\ b\ ,\ alternate\ interior\ angles\ converse$$

Given the diagram and statement below, which lines can you prove parallel and why? $$\angle13\cong\angle5$$

No lines parallel, because vertical angles don't prove parallel

Given the diagram and statement below, which lines can you prove parallel and why? $$\angle13\cong\angle1$$

$$c\parallel d\ ,\ corresponding\ angles\ converse$$

Given the diagram and statement below, which lines can you prove parallel and why? $$\angle10\cong\angle16$$

$$a\parallel b,\ alternate\ exterior\ angles\ converse$$

Given the diagram and statement below, which lines can you prove parallel and why? $$m\angle8+m\angle9=180\degree$$

$$c\parallel d,\ same-side\ interior\ angles\ converse$$

Given the diagram and statement below, which lines can you prove parallel and why? $$m\angle2+m\angle15=180\degree$$

$$c\parallel d,\ same-side\ exterior\ angles\ converse$$

Given the diagram and statement below, which lines can you prove parallel and why? $$m\angle2+m\angle3=180\degree$$

no lines parallel because linear pairs don't prove parallel.

What do we know about perpendicular slopes?

They are opposite reciprocals (change sign, flip fraction)

Geometry Unit 3 Flashcards Flashcards

Student preview

34 questions

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1.

FLASHCARD QUESTION

Front

Midpoint Formula

Back

2.

FLASHCARD QUESTION

Front

Distance Formula

Back

3.

FLASHCARD QUESTION

Front

Area of a Circle

Back

4.

FLASHCARD QUESTION

Front

Circumference of a Circle

Back

5.

FLASHCARD QUESTION

Front

Area of a triangle

Back

6.

FLASHCARD QUESTION

Front

Area of a rectangle

Back

7.

FLASHCARD QUESTION

Front

Corresponding Angles

Back

two angles on the same side of the transversal, but one is an interior and the other is an exterior angle.

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