Question

Tell weather the measurements can be the side lengths of a triangle. If so, classify the triangle as acute, obtuse, or right. 15,18,20. 7,8,11

Answer 1

Hi there!

Let's use the pythagorean theorem for both sets of values.

WORK:

`{15}^(2) + {18}^(2) = {20}^(2)`

`225 + 324 = 400`

`549 > 400`
The first set of values is an ACUTE triangle.


`{7}^(2) + {8}^(2) = {11}^(2)`

`49 + 64 = 121`

`113 < 121`
The second set of values is an OBTUSE triangle.

Hope this helps!! :)