10th Grade

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1

Factorize Quadratic Expressions

2

Find Inverse of a Function

3

Inverse Functions

4

Vertical Angles Are Congruent

How Do You Prove Vertical Angles Are Congruent?

When two lines cross, they form opposite angles called vertical angles. But how do you know they’re always equal? In this video, you’ll use what you already know about straight angles and angle pairs to prove that vertical angles are always congruent.

Done

5

How do you prove alternate interior angles are congruent?

6

How do you prove that the medians of a triangle meet at a point?

7

How do you prove that opposite sides of a parallelogram are congruent?

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How do you prove that opposite angles of a parallelogram are congruent?

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How do you prove that base angles of isosceles triangles are congruent?

10

When are corresponding angles not congruent?

11

How do you use congruence and similarity criteria for triangles to prove relationships in geometric figures?

12

How do you prove that all circles are similar?

13

How do you prove that a line parallel to one side of a triangle divides the other two proportionally?

14

How do you prove the Pythagorean Theorem by using triangle similarity?

15

What is the connection with the sides of right triangles and the angles in the triangle?

16

How do you prove that the interior angles of a triangle sum to 180 degrees?

17

How do you use the relationship between the sine and cosine of complementary angles?

18

What Happens When You Dilate a Line That Doesn't Go Through the Center?

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Why Are Diagonals of a Rectangle Congruent?

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How do you use similarity transformations to determine if two figures are similar?

21

How do you use slope criteria for parallel and perpendicular lines to solve geometric problems?

22

How do you use coordinates to compute the perimeter of a polygon?

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Corresponding Angles and Parallel Lines