Last updated on August 5th, 2025
A calculator is a tool designed to perform both basic arithmetic operations and advanced calculations, such as those involving trigonometry. It is especially helpful for completing mathematical school projects or exploring complex mathematical concepts. In this topic, we will discuss the Pythagorean Theorem Calculator to find the hypotenuse (C).
The Pythagorean Theorem Calculator is a tool designed for calculating the length of the hypotenuse in a right-angled triangle.
Given the lengths of the other two sides,this calculator can determine the hypotenuse by applying the Pythagorean theorem, which states that in a right-angled triangle, the square of the length of the hypotenuse (C) is equal to the sum of the squares of the lengths of the other two sides (A and B).
The theorem is named after the ancient Greek mathematician Pythagoras.
For calculating the hypotenuse using the calculator, we need to follow the steps below -
Step 1: Input: Enter the lengths of the two sides (A and B).
Step 2: Click: Calculate Hypotenuse. By doing so, the values we have given as input will be processed.
Step 3: You will see the length of the hypotenuse in the output column.
Mentioned below are some tips to help you get the right answer using the Pythagorean Theorem Calculator.
Know the formula: The formula for the Pythagorean theorem is 'C² = A² + B²', where C is the hypotenuse, and A and B are the other two sides.
Use the Right Units: Make sure the lengths are in the same units, like centimeters or meters.
The answer will be in the same unit, so it’s important to match them.
Enter correct Numbers: When entering the side lengths, make sure the numbers are accurate.
Small mistakes can lead to big differences, especially with larger numbers.
Calculators mostly help us with quick solutions.
For calculating complex math questions, students must know the intricate features of a calculator.
Given below are some common mistakes and solutions to tackle these mistakes.
Help William find the hypotenuse of a right-angled triangle if the other two sides are 9 cm and 12 cm.
We find the hypotenuse to be 15 cm.
To find the hypotenuse, we use the formula: C² = A² + B²
Here, the values of A and B are given as 9 and 12.
We substitute the values: C² = 9² + 12² = 81 + 144 = 225
C = √225 = 15 cm
The sides of a right-angled triangle are 5 cm and 12 cm. What is the hypotenuse?
The hypotenuse is 13 cm.
To find the hypotenuse, we use the formula: C² = A² + B²
With A = 5 and B = 12, we find: C² = 5² + 12² = 25 + 144 = 169
C = √169 = 13 cm
Find the hypotenuse of a right-angled triangle with side lengths 8 cm and 15 cm.
The hypotenuse is 17 cm.
Using the formula C² = A² + B², we calculate: C² = 8² + 15² = 64 + 225 = 289
C = √289 = 17 cm
A ladder leans against a wall, with the foot of the ladder 7 cm from the wall. If the ladder reaches 24 cm high on the wall, find the length of the ladder.
The length of the ladder is 25 cm.
Using the formula C² = A² + B², where A = 7 and B = 24: C² = 7² + 24² = 49 + 576 = 625
C = √625 = 25 cm
John wants to tie a rope from the top of a 20 cm pole to a point on the ground 15 cm away. Find the length of the rope.
The length of the rope is 25 cm.
Using C² = A² + B², where A = 20 and B = 15: C² = 20² + 15² = 400 + 225 = 625
C = √625 = 25 cm
Seyed Ali Fathima S a math expert with nearly 5 years of experience as a math teacher. From an engineer to a math teacher, shows her passion for math and teaching. She is a calculator queen, who loves tables and she turns tables to puzzles and songs.
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