This article will discuss the right triangle formula, starting from its meaning to example questions and discussion.

*Hi guys *! Did you know that there are various types of triangles, one of which is a right triangle. That *you know *triangle with one side perpendicular to form an angle of 90 °. While the other side is slanted and that is the longest in size. How about it, *have you *drawn what the shape of a right triangle looks like? Instead of imagining it for too long, *let’s *just get into the discussion, *let’s go *!

**What is an Right Triangle?**

On top of *already *I alluded a little bit, if angled triangle is one of the triangles with one side perpendicular and form an angle of 90 °. You can see a picture of the build below:

The side c is the hypotenuse or hypotenuse. *Well *, the perpendicular sides are sides a and b which are called the base and height. So that you can more easily understand what *the heck *triangle elbow, it can be checked from the three following nature:

- A right triangle has two sides that are perpendicular to each other.
- A right triangle has one hypotenuse and one of the angles is a right angle or 90°.
- right triangles do not have rotational symmetry and folding symmetry.

*Well *, if you *already *know the three of the above properties, means *already not *confused anymore *donk *distinguish angled triangle with other triangles.

## Right Triangle Formula of Area and Perimeter

After you understand the concept of a right triangle, now let’s try to calculate the circumference and area.

The perimeter of right triangle formula:

*K = side a + side b + side c*

The Area of right triangle formula:

*L = base x height*

But, what if it turns out that one of the sides of the right triangle is unknown? What formula should you use to find the length of the unknown side? *Yep *, how to use the Pythagorean formula. Here is the formula:

*c **2 **= a **2 **+ b **2 **or c = a **2 **+ b **2*

*a **2 **= c **2 **– b **2 **or a = c **2 **– b **2*

*b **2 **= c **2 **– a **2 **or b = c **2 **– a **2*

**Sample Questions and Discussion**

The formula is easy isn’t it? *So *, so that the formula for the circumference and the area right triangle formula for a right triangle can be easier for you to understand, also pay attention to the following examples of questions and discussions!

**Example Question 1**

A right triangle has sides a, b, c 3, 4, and 5, respectively. Find the perimeter of the triangle!

Discussion:

Given: a = 3; b = 4; and c = 5.

Asked: K

Answer:

*K = side a + side b + side c = 3 + 4 + 5 = 12 cm*

So, the perimeter of triangle ABC is 12 cm.

**Example Question 2**

A right triangle has a hypotenuse of 13 cm. The height of the triangle is 5 cm. Calculate the area of the triangular triangle!

Discussion:

Given: c (slope side) = 13 cm; b (height) = 5 cm.

Asked: L

Answer:

First, we must seek *to know *in advance how long the base of the triangle. You do this by using the Pythagorean formula.

*a **2 **= c **2 **– b **2 **= 13 **2 **– 5 **2 **= 169 – 25 = 144*

*a = **√ **144 = 12 cm.*

After knowing the base is 12 cm. Next we calculate the area.

*L = x base x height = x 12 x 5 = 30 cm.*

So, the area of the right triangle is 30 cm.

That’s the explanation of the area of right triangle formula. Once you *know the *meaning and formula, it turns out to be very easy to calculate. Hopefully the above explanation can be easily understood by you, so if you later meet a question that uses the area of right triangle formula, you will not have any difficulties.