In this Khan Academy activity, students will practice applying the addition rule in context.

This video simplifies (x^3+ 3x - 6) + (-2x^2 + x - 2) - (3x - 4).

The purpose of this task is to provide practice calculating probabilities in the context of a chance experiment with equally likely outcomes and to allow students to develop the addition rule for calculating the probability of the union of two events.

In this Khan Academy activity, students will find the line of reflection or draw the reflection of a shape over a given line.

In this lesson, students summarize data on two categorical variables collected from a sample using a two-way frequency table. Given a two-way frequency table, students construct a relative frequency table and interpret relative frequencies.

In this lesson, students summarize data on two categorical variables collected from a sample using a two-way frequency table. Given a two-way frequency table, students construct a relative frequency table and interpret relative frequencies.

In this lesson, students distinguish between categorical data and numerical data. Students summarize data on two categorical variables collected from a sample using a two-way frequency table.

In this lesson, students use the distributive property to multiply a monomial by a polynomial and understand that factoring reverses the multiplication process. Students use polynomial expressions as side lengths of polygons and find area by multiplying. Students recognize patterns and formulate shortcuts for writing the expanded form of binomials whose expanded form is a perfect square or the difference of perfect squares.

Students will prove the angle-angle criterion for two triangles to be similar and use it to solve triangle problems.

This video shows the formal proof that the measures of interior angles of a triangle sum to 180-degrees.

Students understand that a congruence between figures gives rise to a correspondence between parts such that corresponding parts are congruent, and they are able to state the correspondence that arises from a given congruence.

Students understand that the value of the tangent ratio of the angle of elevation or depression of a line is equal to the slope of the line. Students use the value of the tangent ratio of the angle of elevation or depression to solve real-world problems.