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Here’s How To Find the Hypotenuse of a Right Triangle

how to find hypotenuse: Diagram of a triangle with an unknown hypotenuse

The Pythagorean Theorem is an important theorem, as it comes up often in high school math. It makes the question of how to find the hypotenuse of a right triangle is easy to answer.

Plus, we can use it to find the base of a special right triangle and apply the converse of the Pythagorean Theorem. Let’s review this basic but foundational concept in trigonometry and how it relates to finding the hypotenuse of a right triangle.

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How To Find the Axis of Symmetry of a Parabola

how to find axis of symmetry: Graph showing the vertexes of two parabolas

The axis of symmetry is the vertical line that goes through the vertex of a parabola so the left and right sides of the parabola are symmetric. To simplify, this line splits the graph of a quadratic equation into two mirror images.

In this tutorial, we will show you how to find the axis of symmetry by looking at the quadratic equation itself.

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How To Find the Sum of a Finite Geometric Series

A geometric series is a list of numbers where each number, or term, is found by multiplying the previous term by a common ratio r. If we call the first term a, then the geometric series can be expressed as follows:

sum of finite geometric series: Example of a finite geometric series

We call this a finite geometric series because there is a limited number of terms (an infinite geometric series continues on forever.) In this example, there are 10 terms, the common ratio is r, and each of the terms of the geometric sequence follows the same pattern. The first term is a. The second term is the previous term a multiplied by r. The third term is the second term sum of finite geometric series: The second term in a geometric series multiplied again by r to create sum of finite geometric series: The third tem in a geometric series, and so on until the last term.

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Learn How To Find the Area of a Non-Right Triangle

area of a non right triangle: Diagram of a right triangle

To find the area of a non-right triangle, let’s first review the standard area formula of a right triangle. A right triangle is made up of three sides: the base, the height, and the hypotenuse. To get the area of a triangle you must multiply the two adjacent side lengths of the 90° angle, which are the base and the height of the triangle, and divide this quantity by half. This is the formula for the area of a right triangle:

Formula for the area of a right triangle

However, this formula doesn't work as effectively for acute and obtuse angles. So here's how to find the area of a non-right triangle.

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How To Round To the Nearest Tenth...or Any Decimal Place

round to nearest tenth: Person using an abacus

Once you get the hang of rounding numbers, you’ll begin to use it every day, from balancing your checkbook to estimating your grocery bill. In this post, we’ll show you how to round to the nearest tenth (or any decimal place, for that matter).

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