Area and Perimeter > Right-angled Triangle

Area and Perimeter: Right-angled Triangle

This online calculator is a free online tool to help you in calculate area and perimeter of Right-angled Triangle.

Calculator

Enter 2 values

 right-angled leg (a) = right-angled leg (b) = hypotenuse (c) = alpha (α) = °rad beta (β) =
Round to decimal places.
 Area A = Perimeter P =

Formula

• P – perimeter
• A – area
• a,b – right-angled legs
• c – hypotenuse

You may need: Area and Perimeter of Triangle

Right-angled Triangle

A right-angled Triangle is a triangle that has one angle that measures 90°. The side that opposite from the 90° angle is the longest side of the triangle, we call this hypotenuse and usually referred with variable c. The other side of the right-angled Triangle commonly referred with variable a and b. The sum of angles in the Right-angled Triangle is 180°.

The standard formula to count the Area of Right-angled Triangle

A= ab/2
A = area
a = side of the triangle
b = shortest side of the triangle

The standard formula to count the Perimeter of Right-angled Triangle

P= a+b+c
P = perimeter
a = side of the triangle
b = shortest side of the triangle
c = hypotenuse of the triangle

The Instruction to use the Calculator Online to calculate the Area and Perimeter of Right-angled Triangle

1. First, input 2 values between edges(a, b) or edges (c) with alpha / beta angle in the right-angled triangle
2. Next, you can choose what decimal places you need. It can 1 or 2 or whatever you want.
3. And then, click “Calculate Button” and the answer (Perimeter and Area) will automatically appear.
4. To count another number, just repeat the first step.

Example of the usage of calculator online to count the Area and Perimeter of Right-angled Triangle

1. Example, enter “3” in “a”, and “4” in “b” of the right-angled triangle.
2. Then click enter or “Calculate” button.
3. You will find the answer right there on the Area A column and Perimeter P column. The area is 6.00 and the Perimeter is 12.00.