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

PAF College Lower Topa

How to get admission in PAF College ...

Colleges in Faisalabad

A comprehensive list of colleges in ...

Books for Test Preparation

Find Books for Test Preparation. A ...

Study in Germany

How you can get an opportunity to h ...

GRE Bio-Chemistry

Find what is GRE Bio-Chemistry and ...

SAT Subject Test Biology

Find all about SAT-II Biology with ...

Universities in Gujranwala

Universities in Gujranwala - Punjab ...

QAU Quaid-i-Azam University

Quaid-i-Azam University is a big na ...