Loading...

Lesson: Geometry - 19t01

Finding The Perimeter Of A Triangle

[Page 19 of 30]

What is the perimeter of the isosceles triangle in the diagram below? Choose an answer, and then click Continue.

4√2
6√2
12
8 + 4 √2
14

Countinue

The largest angle in a right triangle is always the right angle. This makes sense if we remember that the sum of the other two angles is 180° - 90° = 90°. This is an isosceles triangle, the other two angles must be equal, and each must be 45°.

Since sides are proportional to the angles that are opposite them, then the two legs of the triangle must be of equal length. We know that one leg is 4, so the other leg must also be 4.

Plug these numbers into the Pythagorean theorem to find the length of the hypotenuse:

Then add the sides to find the perimeter:

4 + 4 + 4√2 = 8 + 4√2

Next to display next topic in the chapter.

Test Prep Lessons With Video Lessons and Explained MCQ

Large number of solved practice MCQ with explanations. Video Lessons and 10 Fully explained Grand/Full Tests.

More for You
All in this Category

You may be interested in

Colleges in Bahawalpur

Find colleges in your area in Bahaw ...

Colleges in karachi

A comprehensive list of major colle ...

Making Millions

How to become a successful person i ...

Merits in Pakistan

Calculate merit for any university ...

ISSB Tests

Learn about ISSB - Armed forces rec ...

Pakistan Army Selection and Recruitment Tests

Join Pakistan Army. How it is possi ...

NCA National College of Arts

The most popular name in fine art s ...

Engineering Universities in Sindh

A list of Engineering colleges and ...